There are many things that Apple could do to bump up the display technology on its 2019 iPhones. Some notable possibilities include support for 4K resolutions on larger iPhones and a much faster refresh rate across the board. Most displays today are excellent, but there’s always room for improvement.
At the very least, Apple should ditch LCD displays and go all-OLED across its 2019 lineup. There have been some rumors suggesting this won’t be the case, but we’re still crossing our fingers. An OLED iPhone XR successor at the same price point would be much more competitive in today’s market (and people won’t complain about its sub-par resolution).