Why are they worrying about making it thinner? Why not make it 3/8" thick with a crazy large battery that can really last all day from 7am to 11pm with all the calling, web surfing etc. you can do in a day? And those numbers are for ideal conditions. What about those times you are in a metal box (Elevator, Warehouse, train, etc.) where you get no signal and the phone is just chewing up battery life? And driving in the country with no bars? (Yes there are lots of places with no towers) And factoring in battery degredation so that after a year when the battery only gets 75% battery life. Or using GPS, bluetooth, gaming, etc. where you can just watch the battery meter fall.

Yes, a phone with a better battery is way more usefull than a slimmer, sexier device. Now that would be a revolutionary feature!