"Even if you don’t own a touch-enabled device, you should expect a completely unique experience."
Uniquly bad experience if you use mouse and keyboard with Metro.
"While this interface is clean and easy to use, Adobe Flash Player is missing, and Microsoft doesn’t plan to include it as part of the Metro interface."
May be because it is already so much like a flash app.
We are unhappy about the Metro app can only be closed by end process too:
There are way too many unnecessary apps on Metro and you cannot multi select the ones you don't want to delete them, which sucks. (Or maybe I haven't work that out yet, correct me and tell me how that can be done please if I am wrong.)
On the other hand it is light OS with low hardware requirement and boot fast:
Compatibility with old software and driver seems good, although only very preliminary:
IMO, it is a big mistake to have Metro activated by default. Metro is not good for device without touch at all. Since the majority of computer still use mouse and keyboard, Metro should be invisible and you turn it on with a button, as oppose to Metro is the default and you have to turn it off by using 3rd party software or going through regedit (many people don't or don't like touching the registry). MS got the GUI priority totally wrong.