Ah, but that display is the whole point! :-) The 1340A is an X-Y display with brightness modulation, similar to the Leader LBO-51, Tek 608 and suchlike. It's not a video waveform monitor for diagnostics, but used for Rutt/Etra-style mangling of video images, like this:
A raster display, be it LCD or CRT, is not able to do this – without a vector-to-raster scan converter, that is, but that's a whole different game. This rack is intended specifically for vector image manipulation, all the raster stuff happens elsewhere. I think I already have enough LCD and CRT monitors for that – including an 8" PVM CRT which I haul to gigs. Can't do that tasty composite glitching on an LCD ;-)
Rescan cameras are Blackmagic Micro Studio Camera 4K for the final output (off the 8" CRT) and a small Pelco surveillance camera for the HP vector display. May replace the latter with something that can be genlocked.