I think it's not viable for exactly the opposite reason: the average american still watches tv for more than 3 hours a day. That's 3 hours of having constant ads - I think if it was less, something like this might be tenable, but I think people are going to be willing to pay for a TV that isnt annoying
3 hours of total personal screen time maybe. Not 3 hours of TV.
according to numerous studies and data gathering, it's about 2-4 hours of TV, depending on who you ask.