Look a little deeper
I'm Church of the True Believers in Linux the Divine will be along to downvote me and anyone else who dares no immediately dump all over Windows. But, they're already living in a hell of their own making where they need the validation of others to reassure them that their choice is the correct one. If it were the correct choice, they'd simply be content that it works for them and not have to worry about what anyone else says. So, I forgive them, for they know not what they do. Anyway, on with the blasphemy.
This is the sort of article I'd expect from the likes of CNet or ZDNet, but far less so El Reg.
So what if Windows Whatever looks the same as Windows Whateverelse? People whinge endlessly if Microsoft moves something by a single pixel or changes the name of something. Seriously, just look at all the complaints about WinME. They all centered around the fact that it was sort of a preview to the rearranging of the control panel that we'd see in XP a little later. Sure, it's annoying to have to try to locate something when you used to know where it was, but honestly, unless you've got some kind of serious brain damage, it shouldn't be that much effort to learn a new location/icon/name.
Just because any given version of Windows looks basically the same doesn't mean Microsoft hasn't been busy improving things under the hood. They've been quietly plugging away at improving security for one. Windows 10 introduced a number of new security features like ASRL and encrypting the contents of memory. In Windows 10 most of these were switched off by default, but Windows 11 turned them on by default. Ever since Vista, Microsoft has been working diligently at improving the security of the driver model with each subsequent release. It involved some pain during the first few years when all of a sudden hardware makers had to rewrite their drivers to work with Vista, and all that cheap ghost-shift electronics from China suddenly stopped working, but we're in a much better place having come out the other side. Sort of like the transition to USB-C. It's not fun to live through the transition period, but once pretty much everything is using a common cable type, it makes a lot of the pain worth it. Same could be said of the policy for forcing people to install OS updates. Like everyone else, it annoys me when I have to stop what I'm doing to reboot, but if you stop to look around, you may notice that the number of issues related to unpatched vulnerabilities in Windows has all but disappeared since Windows 10 rolled around.
As far as the next big thing in computing goes, I blame the open source community for that one. Apple, Microsoft, and Google all have shareholders to answer to. The open source community has absolutely no one to answer to. So, the open source community is in the perfect position to try out all kinds of crazy ideas to see what works, but instead they just spend their days doing poor imitations of whatever Apple and Microsoft are doing. There's just no way to get all the fractious groups in the open source world to coordinate on a single goal the way Apple and Microsoft can by way of the power of the paycheck, but that doesn't mean they can't try out different ideas for UI design. Instead, all we get are a bunch of smug assholes who copy everything Windows and Apple does, poorly, and then claim how they're superior because they aren't charging for their inferior product. Go ahead, try charging for it, see how well that goes for you. KDE and GNOME are usable, sure, but they still lack the polish and refinement of Windows and macOS because they're developed by a disparate collection of people who all have their own pockets of interest, and usually bug fixing and polishing are not as "sexy" as adding new features.
Just one idea off the top of my head, is to create a UI that isn't just capable of being navigated using only a keyboard, but one that is designed from the ground up to use only the keyboard. I'm sure out there, there's someone else who has a great idea that could revolutionize the way we do things, if they could just get people to stop aping Microsoft and Apple long enough to try it. Sure, maybe a lot of the ideas will flop, but the great thing about open source is the source is out there, floating around. Maybe the first person who tries fails, but then a year later someone else comes along and succeeds. Or that second person takes part of what the first person was doing and runs with it in a different direction, which ushers in the next big thing in UI design. But no, anyone who tries this is immediately threatened with excommunication from the Church of the True Believers in Linux the Divine. Everything has to be just like Windows or macOS, but "free" or it won't be accepted. Even though the whole point of using Linux instead of Windows/macOS should be to experience something different, not just a badly done imitation.
Another idea would be to expand on Microsoft's old live tiles idea. Instead of stupid little icons that sit on the screen and do nothing besides launch the app, how about replace them with widgets that can do double duty? They can do things like show you the first couple messages in your email inbox, or rotate between monitoring different aspects of the system without you having to run the full app.
How about someone try tackling different window focus ideas? Focus-follows-mind is probably still a ways off, but maybe someone could create a hybrid of sloppy and click-to-focus that marries the best elements of both.
Someone could take the idea of Microsoft's old Active Desktop from the IE4 days, and implement it in a sane and secure way. Provide an API that makes sure people can't just run whatever random crap they want, but makes it easy to customize some elements of the UI.
Just because something isn't broken doesn't mean it couldn't be done better. If that were true, we'd still be wandering tribes of hunter-gatherers because who needs this silly farming thing when you can just kill and eat some wild animal and pick berries off bushes? Without farming, there's no need to create permanent dwellings, and without permanent dwellings there's no reason for large numbers of people to gather into villages, towns, and cities. Fixing something that isn't broken is called progress.