Kind'a new here but here is some thoughts regarding Windows 8. Bear in mind, I have only tested the Release Preview.
When moving the taskbar to anywhere else, say on top of the screen, the start menu thing still stays on bottom-left. That alone is annoying enough for me personally to not ever install Windows 8. Period. ( I don't mind the fullscreen start menu. )
That awful "thing" called Charms bar to the right. Seriously? Even seeing it makes my blood boil of anger. That alone is annoying enough for me personally to not ever install Windows 8. Period.
This whole "app" lock-in and forced to go by Windows Marketplace, well, I don't like it. Period. It's worst than the other two issues, however. That alone is reason enough to not only never install Windows 8, but to never ever develop any "app" for it. Period.
Windows 8 story is indeed a pretty sad story. I have always installed the new Windows versions coming out, yes even Vista eventhough I hated its name. Frankly, Vista was alright! ( Well, maybe a bit sluggy. )
With Windows 8, not only I cannot even install it due to the above mentioned reasons, it has done something far worst. I no longer trust Microsoft. I know, it is hard for some people atleast to imagine that oh, someone trusts Microsoft, but I did. I always trusted Microsoft. From backward compatibility to my privacy to how it gave me the freedom to do what I want on my hardware. Well, with Windows 8, not anymore.
The issues I have stated above are so important for me on a personal level that I am not willing to install some extra shell to get rid of them. Not willing at all to accept the Marketplace lock-in, ever. Never ever. Period.
I looked forward to Windows 8 before I tried it. Although friends do give each other a second chance, usually, so:
I will look forward to Windows 9. If my issues are not resolved by Windows 9, sad to say but I no longer will be around in Microsoft ecosystem.
The journey which started in DOS 6.22 and Windows 3.1, will have to end at Windows 7. ( No, due to my third problem with "app" lock-in, there won't be any Windows 8 tablets for me either. )