I would rather have 720p and exceptional battery life then 1080p and mediocre battery life.
Agreed, and at the size, I hardly think anyone can notice it... apart from...
I use the m7 and teamviewer to remote desktop onto my home media pc and do downloads. It's much nicer doing it with 1080p than my work laptops 768p
(Too much lower res than the pc results in zooming in and out scrolling etc on chrome)
...this is understandable, but you are surely in the vast minority who use the phone in that way.