Re: "Everyone that is apart from the people that choose to learn how to use it"
One question to think about:
How many applications do you have installed?
Under all previous versions of Windows, the "launcher" had folders to let you organise your installed programs into groupings, and to let the installer put their links together.
That's gone in Windows 8.
If you have more programs than fits a screen, you have to flick through several pages.
If the installer used to put its links into a given folder (eg all from the same supplier), it won't anymore, you'll have to drag them around yourself.
Even iOS has folders on its "launcher" - and most people have far fewer things installed on their phone than on their PC.
The Win8 Start Screen just doesn't scale. If you've only got one screenful of applications, it's ok. As you add applications, it becomes more and more unwieldy.
Personally, I have well over a hundred applications installed - most are "rarely used", but I still need them and I still want them grouped nicely so I can find them quickly.
- As I use them rarely, I may not remember enough about the name to use Start->type, or even recognise the icon, but finding "widget drawing" in the "drawing" folder is easy.
Doing the same in Win8 Start Screen isn't possible. I must recognise the icon or know its name, or it is almost impossible to find.
- One example of a useful UI improvement that was clearly based on proper research is "Pinning" in Win7 - those few applications I use every day end up pinned, while the more rarely-used stay in folders in the Start menu.