>>3
From guessing, and making numbers up, that would require displays with around 2500+ pixels/inch. (assuming the displays in the T4s are around 1 cm tall) You're basically comparing with full size LCD screens, and hoping for the tech to shrink by a factor of 25 - and that's a lot.

OTOH, assuming 1 cm tall displays would make the resolution of those around 1200 dpi already. Pretty impressive.

Damn, now I really want a pair...