That is already possible with Stadia (and possibly other game streaming services).

Yes it is, but it's not there yet (see my reply to the sibling comment).

If you don't mind the "cloud" being your LAN, and you already own Cyberpunk just download the Steam Link app.

I do use Steam Link, and it's great, but it'll be even more amazing when I neither need to own the games nor the computer. I want to be able to rent a computer in the cloud (like Nvidia Geforce Now) and rent the games as well, on a subscription basis (like Xbox Live/Xbox Cloud Gaming).