The new Macs with M4 Pro/Max have Thunderbolt 5 which supports up to 120Gbps video bandwidth: 3x that of previous gen. That should cover 8k120 or multiple 8k60 displays! And the regular M4 now supports 8k60 displays I believe due to DSC.

New ideal setup is 8k120hz TV placed about 3-4' away. Better for the eyes too.