ui is similar to n9, but vertically. control apps from multitasking view without actually going into them. nice customization.
apparently runs on many devices!!! saw an ipad, a raspi etc etc!!
so excited!
edit:
double tap to unlock, lots of swiping, no hardware buttons, really beautiful, i'd say great evolution from harmattan. no nokia legacy in shape of buttons etc. looks a bit like a windows phone and android crossover aesthetically. again, really nice.
no status bar (pull up lockscreen to see it).