Microsoft already has a patent on using in-home censors to set fees based on how many people are watching a TV. I'm excited to see us reinvent TV taxes as a shady, privacy-destroying rent we pay to tech companies...
I think they even had this as a production ready feature in the Xbox One at one time (before launch, but at a very late stage), but were surprised that users were a bit miffed about it.
Plus now they get to spy on us using tiny little cameras !