How tech illiterate are we talking? Are they just on cable or can they use apps? I got my very tech illiterate parents set up with one of the Amazon fire TVs which has worked well for them because they don't need to worry about switching between inputs or anything like that. One remote and they just turn on the TV and all of their stuff is there. I had to do the basic app setup for them to get them squared away with YouTube TV, Netflix, Prime, etc. but once they picked up on that you click on YouTube TV to watch TV, go to Prime or Netflix for movies, etc. it's been very smooth sailing.