Again, so many options. With a little forethought, they could take pinball in a completely new direction. To have a webcam on each machine, and allow people to connect via the internet for tournaments, or game nights would be awesome. While one person is playing, everyone else could be watching them on their monitors. Hell, with two webcams you could add a toggle that would allow you to switch from watching the person, to watching the playfield, or a split view.
Hell, you could add interactive toys that the people you're PLAYING against could control. Or, for example, enable a mode where certain shots would earn you an "ability" to play on your opponent's turn. Reversing their flippers for a couple of seconds, for example. Or a "blackout" effect. Of course you could allow people to turn these on or off as they see fit, but I could see myself having a blast with some of those while playing with friends. It would allow for standard playing of the game, but also aspects that would increase the replay value and interactive abilities.
Lots and lots of possibilities that I should be trying to patent rather than posting about, haha.