HDMI is RGB plus clock in 4 differential pairs. Fundamentally you just need 3 shift registers with reset tied to clock. Out comes the signal and you wire that to RGB electron guns through an E24 resistors assortment pack.
LLMs probably don't know enough about them to be useful in this discussion. Classic Google Search would be better. Yours fixating on pixels shows that.
I think the difference here is more that I'm talking about the practical reality of today's display interfaces (both sides have a full frame in memory, typical overall latency is 5-50ms), whereas you're discussing what could be theoretically possible with dedicated emulation hardware that streams out an unbuffered HDMI signal and an HDMI-supporting CRT that operates similar to a modern VRR gaming display.
LLMs probably don't know enough about them to be useful in this discussion. Classic Google Search would be better. Yours fixating on pixels shows that.