On the one hand, it’s cool that they pushed old electronics way beyond the known limits, but on the other hand is 120p really an accomplishment?
Even my old Commodore 64 from 1982 was able to produce around 400p when pushed to the limit (I know progressive wasn’t thing on tvs then. I’m simplifying things to not end up on a side quest here). The norm was 200p and exploring how far the electronics could go in that resolution would be far more interesting in my opinion.
If we’re just focusing on framerate, I’m pretty sure it would be possible to reach over the kHz limit with 1p.
Essentially it would be possible to run 1p led-aray at 1MHz or more…