Failure / Supposition / Baseless waa waa here.
It's really getting a little dull all the "Windows 8 is a failure" nonsense - based on nothing of any meaningful substance.
Yes, it's different. That's right. Different. Because what worked in 2002 isn't working in modern IT. But if you stopped moaning for 5 seconds about the mildly different "start screen" part, there's little different in terms of "doing what you did before" - but there is a boatload of "can do more than you did before" stuff.
As someone who is ACTUALLY using Windows 8, in all its forms (eg Windows 8 RT on my Ideapad Yoga, Windows 8 Enterprise at work, and Win 8 Pro with media Pack at home), and with both touch and non-touch devices, I can't say I've had any real problems at all.
If anything life is easier now - my home PC and ideapad now share settings - so I setup my e-mail on one, and voila, both have it setup, my stuff is sync'd and shared quite nicely, even down to colour schemes. For work, I can use all the latest everything (and do, including Office 2013), but my old apps (even my preferred e-mail client that is really really really long in the tooth) work just like they did before.
So I've lost nothing, but gained a lot, and we're finding lots of customers adopting Windows 8 too (especially at home). I suspect Surface Pro will be popular in business, cause like, y'know, it's a tablet which is all the rage, but actually more like a laptop too, runs all the stuff you already have, want to run and know, but gives you the flexibility of tablet style use with the power of a normal laptop, and the ability to use it like one of those too. I can think of a zillion different use cases. For me, the yoga makes more sense - one device, multiple use options (tablet for sitting reading browsing, laptop for doing work, e-mail, intensive input stuff), and nothing is removable - plus I like the long battery life and lightweight etc of the RT Yoga.
I reckon with the right hardware options for your intended use, Windows 8 is ace.