> In a world where privacy is constantly being eroded intentionally by governments and private companies, I think this will NEVER, ever reach any consumer grade hardware.

Why not when government can just force companies to backdoor their hardware for them. That way users are secure most of the time except from the government (until the backdoor in intel's chips gets discovered anyway), and users have a false sense of security/privacy so people are more likely to share their secrets with corporations and the government gets to spy on people communicating more openly with each other.

Arguably this is less useful for consumer hardware in the first place. This is mostly useful when I don’t trust the service provider with my data but still need to use their services (casting my vote, encrypted inference, and so forth)