That already exists. Citrix was doing this a decade ago - VMware too. I think Office was even one of the apps Citrix used to demo its thin client plan when Chromebooks first launched. Honestly, containerize it (for easy spinups), and if you have the bandwidth, a lot of apps would probably be really great run fully remote.

Microsoft released Windows Virtual Desktop earlier this year that is basically a cloud version of Windows 10 (or 7) or Office, that’s designed to be used like Stadia.

Disclosure: I work at Microsoft but not on any of these projects