Re: I don't see a problem.
Those that do DRM and actually care about the results obviously do detect VMs and refuse to play in them or only play degraded quality.
Same with open source video drivers etc. Won't play. DRM gizmo authenticates to the video driver which authenticates to the hardware. All data between them is then passed encrypted. This is already present in most PCs - see Protected Audio-Video Path.
No compliant DRM gizmo / video driver / etc for your OS? You'll simply have to pirate the movie if you want to watch it.