How is this going to work when someone like me is flipping around sports channels? Say you are on YouTubeTV, Sling, Comcast, ATT, etc interface watching CBS, Fox, NBC. Get out of it, fire up Roku or go to your Smart Tv apps, and sign in the ESPN app? That's a lot of work. Unless there is an ISU, Big 12, or some other compelling game on ESPN, I may stick on the main interface, even if 30-50% of the games are ESPN.
The TV boxes are going to have to adapt. More processing power and RAM to allow for you to have more than 1 app running at a time would help flipping back and forth. Currently, most devices will only run one at a time, thus causing you to start the app back up whenever you switch. Basically going to need something like the old picture in picture TV's with multiple tuners.
If someone figures that out, they're going to make some money.