Just do not understand the market for this one. The current size of phones is a solved problem. Nobody is asking for these things to be thinner. Most people use cases and are happy to add some thickness for battery life. Besides, the camera "plateau" makes it all futile.
What do you need battery life for?
Aren’t you in your house or office or car near a charger most of the day?
Do you spend 90% of your waking day in the middle of an open field far from any sort of charging capabilities?
Why would I add more weight to a phone so I don’t have to put it on the charging MagSafe puck that is inches away from me at all times