An LCD has to buffer the entire frame, then process it, then display it, and there's also a small delay for the crystals to transition to the new frame. Meanwh

An LCD has to buffer the entire frame, then process it, then display it, and there's also a small delay for the crystals to transition to the new frame. Meanwhile, a CRT shows the frame as it's still being transmitted, while the source computer is streaming each line out from the video buffer, with only a negligible delay (analog electron beams are fast!). This means a maximum of a 1/60-second delay even if the source is composing the whole frame beforehand (double buffering). If the source is doing computation between the scan lines (very common and even necessary on old systems, like the Atari VCS) that delay can be shrunk even further.