I guess it's not really important. Many companies and consumers will stay for Windows 7 for a while and Windows 8 will enter the markets primarily via tablets. By the time Windows 8 SP1 or Windows 9 we'll see how that strategy worked out, and they'll probably tune the experience to make it an acceptable desktop operating system (either on real desktops or docked x86 tablets).
That said, I have used Windows 8 out of curiosity for some weeks (as a UNIX user since 1994), and I have to admit that I quite liked it. I didn't really use Metro, except for checking Facebook and Twitter every now and then. Of course, I am not a regular Windows user who has learnt usage patterns over the years, but I think there's also a lot of inertia.