>As further proof, the patent you’re thinking of where cameras monitor the user is actually from 2009 and was patented by Sony. US8246454B2

I'm not OP, but I'm really not sure how you came to that assumption. A cursory Google search for "Microsoft monitor patent" brought up a bunch of articles that actually linked to filings like what OP talked about from this year.

https://patentimages.storage.googleapis.com/26/6f/30/238c9d7...

https://image-ppubs.uspto.gov/dirsearch-public/print/downloa...

https://www.tomshardware.com/video-games/microsoft-patents-s...