Looks nice for anyone who likes PDA/phone combos. Seems to be a nice step up from the 650, overall. More space, updated programs, higher resolution camera, presumably a faster processor, etc.
Not my thing personally, however. I don't really use a phone that much - a perfect phone for me would have two things: ability to place calls, and uncrippled Bluetooth. No camera, no games, no web ability even - but maybe text messaging. Maybe.