HDCP already encrypts everything starting from video decoding to the signals being sent to the monitor. It really can't get "deeper" than that, other than maybe fixing whatever current vulnerabilities pirates are using to bypass it.
Then it'll get re-extended to 1080p again? Point being, I can see live 1080p to 4k upscale via generative AI becoming a feasible alternative to watching the original 4k stream where DRM prevents you from accessing the latter.
