There are a couple issues with Windows 7. First off, not everybody likes big thick borders
could be my eyes of course and how steady my hand is, but I do like them. So much easier to grab. On my Fedora KDE laptop I keep on cursing when trying to grab a window border to resize it

and on the main topic: I tried last years dev preview, earlier this years whatever preview... no way I'm going to move to w8, not even when they paid me.
Tom UK
PS, for completeness: big box on windows 7, up to date laptop on Fedora 17, netbook on MacOS, so no OS religion involved