Why 1/30th?

Latency will be far more than that due to speed of light.

My mpeg vision circuits are about 480ms end to end from Washington/New York to London. The j2k ones are faster but still in the 200ms range. In theory you could get it down to sub 100ms but at that point you are certainly having to engineer your paths correctly and use barely any compression.

Uncompressed 4k is in the 10gbit range. My uhd jxs bitrates are about 1.3gbit but wouldn’t deliver sub 200 across the pond.