I tried it at a friends place, input lag was insane and quality wasn't good. It doesn't compare favorably to Steam In Home streaming.
Steam Link is a much cheaper solution to that whole concept anyway. If they want to stream the other way (PC to console) then they need to do proper KB/M support and while they give it lip service, I doubt they will bother.
Playing: Elden Ring, HZD: FW, Kingdom Rush series
Watching: Severance, The IT Crowd, The Batman