I am far from a Microsoft fan (very very far), but my Windows 7 machine at work is not bad at all.
And my company (which is very tech savvy) has chosen NOT to upgrade.
‘Twould seem that a prudent move for MS would be to keep tuning up a good OS, not change things.
Apple has fallen into the same improvement trap...even as an Apple fanboy, I think little of their latest upgrades.
Windows 8 is just an unmitigated disaster, Folks responsible for deciding, lets cram the ZUNE interface onto the desktop, and not only that make it the default interface should all have just been summarily fired... 8.1 made 8.0 at least usable, but its still a giant fustercluck.