But the battery on my Note 4 is fine. I mean my 1440p Note 4 gets the same battery life that my 720p Note II did.
I went from 720p to 1440p and the display quality difference is not negligible. It's very noticeable. I'm having no battery trade off either, so it's been a win-win for me. /shrug
But the question is
Was the difference only resolution related or was there something else? Better colors, viewing angles, etc.