If you find game streaming on your LAN unplayable you probably have a setup problem. If you have a solid router and you're only going through ethernet, no wifi then stuff like steam in home streaming should be basically flawless as far as framerate and input lag goes(I get ~3ms added from the streaming iirc). You will notice video compression artifacts though of course.

I do always use it with an xbox controller rather than mouse+keyboard though, so it's less latency sensitive.