Been running it for a while...
.. and the dev preview before that, why?
Well, I've only got one windows 7 license, so I installed it as dual boot on my hackintosh, to play Steam games, Diablo III, etc.
In short, I haven't used it for much else - busy typing this in windows 8 now, as I've just finished a gaming session, will shortly boot back into Mac.
I completely ignore the metro interface - it's absolutely pointless on a desktop, I can't stress how completely bad it is UX wise. Heck, other people have already stressed that :)
So, what is the difference between massive tiles and icons? - I guess the tiles can display additional information prior to launching the associated app - but heck, widgets on a desktop can do that.
It's amazing to me just how arrogant desktop developers can be.
We've seen it with Ubuntu, we've seen it with Gnome 3 - and now we're seeing it with the biggest desktop computer OS in the world - "We're right, this is the future", completely ignoring their user base screaming "this is so wrong, please stop!"
Perhaps microsoft will relent and provide a simple way to just turn Metro off, but therein lies the big problem here.
With Metro off, windows 8 is effectively windows 7. What a shame.
Really, they should take a leaf from MacOs X and concentrate on software enhancements, new features and a measured approach to interface enhancements and most importantly *separate the mobile OS from the desktop OS!*
In a world where windows XP, after 11 years, *still* has a massive user base and where uptake of windows 7 is only now starting to overtake XP, surely microsoft would learn an important lesson?
It seems not - the bean counters hold sway - "we need a new release! Everyone is going mobile, we need Touch on *everything*"
WIndows 8 will no doubt shift in large quantities, but only through OEM - I suspect this will be another Vista for Microsoft. In the meantime, Apple and Android will continue to dominate the mobile space and windows XP and windows 7, the desktop space.