I think a few more things have to be done to make Pinball ready for network TV.
1. Pinball coverage would need to be heavily edited to make it interesting. Commentary would be better if it wasn't live and was rehearsed to make it seem more polished. Also, screenshots of game history and general rules should be shown and gone over before each match as well as quick player profiles to make the viewer feel some kind of connection to the players.-also need some kind of standings/scorecard posted on the screen.
2. Direct audio should be captured off the game and mixed in with the commentary to give people a feel for the game music and sounds. A flat top down video with no sound isn't a very fun way to watch pinball.
3. multiple camera angles- You could use the top down for general play but switching to get a player prospective view or close-ups of the toys/features in action would make the game more interesting to bystanders.

I don't know about in the game, but you could have stand-off camera holders that slip into the glass channel and hold mini cameras 6" or so above the game that could be utilized to grab special angles.