you seem to think watching 2 things is what is going on.. what if you have 2 games on the new nfl sunday ticket stream and a baseball game on some other app.. even changing between games on streaming the same app is a pain. no pausing/buffering/swapping.. Now maybe someday they fix that but it hasnt happened yet.One on the laptop and one on the main screen. Only way to roll these days.
and yeah you eventually can have 3-4-5-6-7 tvs in a room, but not every house has the room or wants to go thru that..
at least with cable/sat its pretty easy to do last channel etc. some have multiple tuners to swap. streaming dumbs everything down and t he interfaces are terrible as are most of the remotes.