It's certainly true that during the recent years TVs have shifted from being broadcast receivers to general display devices meant to be connected to all kinds of equipment.

However, lots of TV series still receive the majority of their financing from the airing rights from TV stations. I'm not entirely sure that mechanism has yet adapted to the future situation of traditional passive, commercials funded TV stations phasing out. Samsonlonghair's methods of bittorrent or (unofficial since it's adless) streaming doesn't really fund any future TV series.