This is something I've been thinking of as well. There's actually a demo implementation with few games that support fully remote gaming but the problem I've been running into is some memory limitations on iOS devices causing crashes. On Android everything seems to work a-ok. I think the iOS problem can be solved, just will take some time

There are remote team video games like (mine) https://epicwin.team .

Slightly different approach, each plays in their browser/phone and there is no “main display”. And my games are cooperative. DM if interested.

I’m releasing a new game BossBattle soon so keep your eyes peeled.