I'm all for eliminating the "human element" (aka errors), but I also value a wide receiver that knows where the first down marker is. Why not implement it on a trial basis during the preseason and see the response?
I'm more interested in the NFL setting regulations that would ensure each game is filmed with the exact same number of cameras and angles. Or syncing replay footage and giving the officials a side by side view of two different angles.
Then again, they don't seem interested in making sure fields are safe to play on, so I don't know what I should expect.