I have a 13 and I’m ready to upgrade to a 15.
Dynamic Island
48MP main camera
2x zoom
6gb RAM
USB-C
2000 nits peak brightness outside
Cinematic mode up to 4k 30 fps
I personally think it’s a great upgrade, especially for the camera and the extra RAM.
Dynamic Island = Meh...
48MP main camera = Pixel Binding and a slightly better quality, neat, but then again, new is always better.
2x zoom = Neat
6gb RAM = Don't miss the extra 2GB today, so... meh..
USB-C = Neat, but not something that would make me upgrade
2000 nits peak brightness outside = Neat, but have gone without for so long, and don't have major issues
Cinematic mode up to 4k 30 fps = Didn't use it in 1080P, guess I won't either in 4K
Also 4K is not used on my iPhone. I use 1080P 60fps. Using 4K is a waste of storage. You do get more pixels in the video, but not the quality of 4K. A mobile camera just has a to small optical lens to provide genuine 4K.