If you want to kick somebody's butt about it, aim in the general direction of Qualcomm, not marketing but engineering.
So you most probably overestimate your ability in power management. Think about what might be necessary to achieve a win from sprint-to-power-save, and why the phone you own might not implement that. Think about the whole system.
Video resolution is readily distinguishable from photo quality. If you don't care about that then go for it.
"Cameras don't take pictures, photographers take pictures."
A great musician playing on a honkytonk can't make it sound like a Steinway.
Do they even make f/8 lenses?
Most ultrazooms will be in that range at the long end.
Is the one you have with you at the time you need to take a picture.
...If you really enjoy wallowing in a sense of regret as you review the shots that is...
You don't need the newest generation of gear to do what you've always done. You can use the newest generation of gear to take photographs that you wouldn't have taken before.
The step up to 20mp+ full frame is really watershed, nobody will fail to notice the difference vs generations just 5 years ago.
...the longevity of the equipment keeps increasing. I'm currently shooting with a 5D Mark II...
The Mark III completely and utterly devastates the Mark II, so does the 6D.
Most people just want to mash a button and get a picture. Phones give them that.
So does the 5D, just leave the mode dial on "green".
I have some great photos I took with my phone. Whenever I look at them, I feel a twinge of regret that I didn't take them with the DSLR instead.
When I do lug my DSLR around (which is often) I always have my (fairly respectable) smartphone too. I _never_ take a shot with the smartphone when the DSLR is at hand. If it's a real shot that is, not just somebody's license plate in a fender bender or something. A decent holster case makes a world of difference.
UNIX is hot. It's more than hot. It's steaming. It's quicksilver lightning with a laserbeam kicker. -- Michael Jay Tucker