Hmm..
Phone is a very good concept... But not a Novel one (Pocket PC's and palms were all around us, Also not to forget the SE P8xx,9xx Series).
But as i own P910i i can really appreciate the phone's operation is Landscapr(widescreen) format.(P910 works in potrait mode). This allows websites and documents to be rendered more naturally...
But my personal opinion is that any phone which doesnt have a sufficent keys are not very practical... (My personal opinion though... Lots of ppl use Sony Ericssons P Series phones without the keypad, also not to mention TONS of Pocketpc's which dont have a keypad)
But one thing i must admit is that Phone looks absolutley cool. I mean.. i have seen it with a couple of ppl in malls and all.. the phone def. got the 'flaunt' value...

Oh yeah.. One bit of advice to 7710 (or anytouch screen phone owners). GET A SCREEN PROTECTOR, or in our dusty environment, phone's display gets scratched in not time.!!