You can't "emulate lenses on a screen" unless it's a lightfield display (which it's not).

With higher resolution you could correct for more lens distortion, but you still need lenses, and you won't be able to fix lens flare on fresnel lenses.

You'll have to give me more details about that, because that seems physically impossible to me (at least with the common definition of "screen").

Interesting, I wonder whether dynamically adjustable lenses can be used to treat vision problems.

I quite sure that's physically impossible with an oled display.