I haven't seen any mention of this yet: how does this impact battery life? Is the front camera on all the time, periodically, only for certain apps, only for certain interfaces of certain apps?
Honestly, one notable feature of the 4 that looks promising is AirGesture, or being able to wear gloves or slightly hover above the screen instead of pressing and swiping/tapping.
Honestly, one notable feature of the 4 that looks promising is AirGesture, or being able to wear gloves or slightly hover above the screen instead of pressing and swiping/tapping.