GeForce Now lets you stream games you own across different digital storefronts on PC from a server in the cloud that is most likely much more powerfull than your own PC. There's a free option that lets you play for an hour per session, or a subscription currently costing $5 that lets you play as long as you want, with Ray Tracing enabled.
Personally I think it's the best take on a streaming service yet, mainly because if the whole thing folds, you don't really lose anything. Shame that publishers are pulling their games from the service though. Was really looking forward to playing Borderlands 3 like this.