Why not? There's no need for the neck to have more than 1~5 ms of lag, and about 5~10 ms photon lag even with a framebuffer involved (if you align the rolling

Why not? There's no need for the neck to have more than 1~5 ms of lag, and about 5~10 ms photon lag even with a framebuffer involved (if you align the rolling shutter of the camera to the row-by-row multiplexed display, say OLED @ 240Hz, you should manage 4~5 ms).