[imagine99]

Are any of those, or a similar well-polished service, available for use with your own workstation, e.g. for 3D/engineering/video editing workloads? (Basically remote desktop on steroids)

[solardev]

Shadow is just a remote desktop with a GPU. It gives you Windows and the rest is up to you.

I wouldn't call it well polished though. It works but it's kinda janky, with heavy compression artifacts and occasional input sensitivity issues.