I wonder if there’s a tech demo somewhere on the Internet of DoF using eye tracking

edit: huh yeah, here’s a video 18 years old. kinda neat https://youtu.be/HdW1v9TPNYw

if you have coax you can look into using MoCA adapters. Quite a bit faster than powerline but you do need to add a filter to the incoming cable line (if it’s connected and you can actually get to it) so your data doesn’t get blasted outside your residence