Project Q is the upcoming streaming only device that will allow you to play games installed on a PlayStation 5 remotely.
It has not been announced if the handheld will allow streaming of games from the cloud and is rumoured to cost between £250 - £300.
Will you be picking one up later this year?
The SteamOS Linux install is skinned pretty similarly to Windows/macOS. It’s not much of an adjustment unless you need all kinds of custom software. I can’t say for certain about those games but you can definitely run Windows games in desktop mode. I’ve played several of the Assassin’s Creed games and run a few emulators in Desktop mode.