I just have a windows 10 machine plugged into the TV. I have a server farm upstairs with plenty of storage for archives of TV shows if I want them, but these days I can get pretty much anything I want from one of the streaming services online.

I also have a glass table between the couch and the TV, so a dark field mouse is required if I'm doing anything that needs a real mouse. For everything else I just use a wireless keyboard/trackpad combo from Logitech.