The metro stuff occupies the ENTIRE screen, so, yes, it can be called UI, and, some people who aren't so good at computers aren't even able to get off it and get back to the desktop. Yes, it's true. And, about the second phrase, yes, Windows 7 was THAT much better. Vista was almost unusable before service pack 1, because it was so bloated and slow and Windows 7 corrected all that and had a much better kernel, and yes it also had a BETTER appearance (which windows 8 failed to deliver). I dunno if you work for M$, but whether Windows 8 is an improvement from 7 (or even XP) is much more debatable than comparing 7 to Vista. If you doubt it, just take a look around the internet forums around the world.