How about a game that notifies you by text or email when a switch is out of adjustment or a when an LED has failed, if the game is reset by the slam tilt being activated, audits information or the bill acceptor is full or when ball search is activated.
World-wide tournament tracking that syncs with your smart phone. Ability to save your progress and resume where you left off.
Ability to remotely update game
Ability to remotely watch someone else play the game live.