The next iphone SE should keep the same size but using all screen as a display (like the iphone X).
Not realistic, but I would also love an e-Ink or Mirasol display option, so that battery life would last much longer. The tech has gotten a lot better, and readability in sunlight is fantastic.
But honestly, I’m done with Apple. I collect old iPhones and use them until they give out. I will not buy another flagship but am really interested in Purism’s phone. Currently have an SE, 5S, 2 5Cs, and a 6. I use them for various purposes and eventually will recycle when they die