It looks cool, but I'm worried about readability on the phone. The text in some of those menu bars and notifications really blended in with the wallpaper in a few of those screenshots.
It will be even harder to see in anything but a dark room than these perfect press videos show.
IMO it should "opaque up" the glass stuff when the blur detects significant similarity between the text / icon content on top, vs the blurred background on bottom.
"COOL" is not "success".
I am surprised they forgot the important detail of good contract to be able to read the name of apps.
But yes, terrible visual usability. Otherwise it looks nice, better than flat.