http://www.theregister.co.uk/2012/03/03/andrew_does_windows8/
I've always been a huge fan of Andrew's writing. He's almost always spot-on.
I installed Windows 8 Developer Preview in VirtualBox. As with 7, it's very snappy and responsive, even using VB's built-in RDP. I'm going to install it on my "entertainment" PC sitting under the TV stand just for kicks. But the short, I'm not overly excited about Metro. Not at all, actually, for my laptop or a business PC.
I can, however, see some keenness on a PC connected to the TV. I have to use 1024x768 on the TV (yes, it's non-HD over S-Video, wanna fight about it?) is barely readable even using the 150% setting in 7, mostly because many websites over-ride my preferences. But I can see switching to 800x600 with Windows 8 and it being very usable... at least in Windows terms as most programs simply cannot contain themselves to such low resolutions (even bloody installers) and I'll be luck to find the [OK] button.
So, again, it looks like it will work well for an entertainment environment. Agreed, get rid of Metro and the performance enhancements would be a boon for productivity apps. Otherwise, 8 looks like a fancy toy.
As far as 7 goes, personally I absolutely despise, loath, and abhor (not to mention just about any thesaurus word for "hate") the Vista interface. I can't stand navigating a phone tree to use my computer, and asking "Windows, may I?" to access some of the advanced functions I have to access on a daily basis in the line of my IT duties. For my business users, and were I a standard user, I would be able to settle just fine. But I am not, and I have found that many users possessing power user-level skills and above feel the same as I do (not all, mind you, but the majority with whom I work.)
I've been rolling out Windows 7 x64 since just about its release. The betas and RCs were splendid, so I was quite pleased and ready when the time came. XP mode works beautifully, in my experience. Vista, on the other hand, was a nightmare and a disaster -- for a while I was making good money "downgrading" computers which shipped with Vista, and I did not sell a single computer with Vista on it.
Hopefully Microsoft will listen to the business market and realize that they can capture the home and mobile market with Metro without pissing off business. Of course, business will follow grudgingly into the fold if they have no choice.