Windows 8.1 is released, 3 days ago anyway.
Windows 8.1 review | Operating systems Reviews | TechRadar
The update is available in the app store. If you're running Enterprise Edition, you have to get the update iso from MSDN. Annoying, but oh well.
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I did an upgrade from Windows 7 to Windows 8 Pro. Then from Windows 8 Pro to Windows 8.1. Mostly painless, save for a service that was disabled that Win 8 needed and would cause the PC to lock up after an hour.
Windows 8.1 upgrade is in the Windows Store, and not on the updater....kind of foolish decision, that.
I didn't notice this before, but the upgrade from W7 to W8 is essentially a new install; it imports everything...programs, settings, the whole 9 yards.
Beyond that, a programs like Start8 or Classic Shell is still needed to restore functionality to the desktop itself. Good thing MS doesn't make cars; they'd put the brake pedal next to the brake lights.
Metro is far less painful now...not sure why. I pinned all my games to it, makes for a fast launcher, I guess. Also nice is that it can use the desktop wallpaper as a background, and can make tiles really small now and assign them to groups.
Dumb: Forcing the user to have an MS account to install the fucker. Dumber: Making Skydrive an Opt-Out function instead of an Opt-In function. Your grandma can see all your porn now!
Killer function: the new search is KICK ASS.
Gaming is smoother. No increase in FPS, but I had some hitching in GW2 in LA; all gone now. The game is buttery smooth all the time.
In short, all the dumb things about W8 are still there, and can be bypassed by 8.1 in part, and with Start8, in whole...just like before. There's a lot of improvements "under the hood" as is touted everywhere about W8.1, and that alone is worth the jump from W7.