Thinner, faster, lighter, taller screen. It looks nice but I'm not all that happy with the new connector making my 4 docks obsolete. But I'd have to get a new ProClip dock for my car anyways as my current one form fits the 3GS, and I don't use 2 of the docks all that often. I could get by with using the included charging cable and WiFI sync at home. The reversible design of the Lightning connector would at least make plugging it in less fiddly.