We've already seen digital rear view mirrors in GTs and LMPs for a few years now, this includes on-screen information on where another car is.nzjrs wrote: ↑04 Dec 2020, 10:46Transmission time isn't significant, it's mostly coming from elsewhere.
A good starting point to estimate this (assuming they do no image processing) is 1/camera-fps plus the display latency (a good LCD is ~20ms). Addition because it's going to be asynchronous and worst case is you have to wait a full frame for the display update and a full camera frame too.
Any other processing thing they do (badly) in the middle will add a couple ms - saving, scaling, etc.
Then from experience I added another few ms as a fudge factor.
Such systems are entirely functional. The 20ms you name is quite high. For example This screen has an input lag of 0,009s according to this site. And those are for consumer accessible devices.
The mirror wouldn't need a 4K resolution, and on some sides don't require the specifications that you'd want for your TV. The big advantage they would bring would be in information outside of the viewing range; ie. is there a car.
I believe this can all be projected in a more than sufficient timeframe