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One other thing to add: Windows 8 now wants to install drivers for your hardware in the background, so when it was installing my videocard drivers (without any indication beforehand), I suddenly dropped to a black screen for about 3 minutes. If not for the "new hardware found" audio notification, I'd probably have thought the OS had crashed on me.
2 years, 5 months ago on Hands-On With Windows 8 on the Desktop: A Confusing Jumble of UIs
I've noticed many of the same things that you mentioned in the article. One thing I don't like is that the Windows Key now cycles between the Metro UI (which can not be shut down as far as I can tell) and the last application. Also, some of the Metro apps have no clear way to quit them - you have to hit the Windows key again to toggle back to the Metro page. Alt-F4 does bring up the restart dialog from the Windows desktop (so there is at least one alternative to ctrl-alt-del), but it only works there.