TV has already done many of the oldest, like tic-tac-toe, hangman, charades.
And several of the board games, like concentration and Scrabble.
And now of course there’s the passive games, watching people play poker, etc.
But there are hundreds more.
What else?
I suppose if people watch poker, they would watch Go Fish or even War, if the had a breathless color announcer.
For the classic paper games, there’s Connect the Dots - Each three contestants would get to ask for two consecutive numbers to be connected, then try to guess the picture.
Or Jarts, the banned yard game, could be revived, on a tropical island where there are no safety laws.
As you say, people will watch poker on TV, and watch people bass fishing, so we should start Celebrity Jigsaw Puzzles. And to make it more interesting, the jigsaw picture would be
a scene from the movie where all contestants share credits with Kevin Bacon.