I like it. And as belfiore said "It's only scratching the surface of what's to come"
PLZ android did not take anything ... as MS said Windows 1.o has been done, there is oneDrive, xbox One, One note so Windows One while i like it as it sounds unified just addes to the big mess one things named One in MS ecosystem .... b
I think a pure Modern UI experience is superior than the windowed environment. Windows 10 is a step backwards.
Apps looks better without chrome, specially content consumption apps.
Windows don't add much value, but they add friction, the user have to manage them. The most common layouts are an app taking all the space, or two apps, each using 50%.