One of the ideas I’ve had is for a self-leveling playfield. Basically you can wheel in in anywhere, hit a button, and even if the floor is uneven the table will balance itself right to left and set the angle of the playfield to the default (6.5 degree slope is what I have in mind). One interesting side effect is that I could programmatically change the slope of the game at any time. Perhaps make a game mode harder by raising the slope, or tilting to one side until the player makes a certain shot or the time runs out.
I was just given two Bosch seat recliner motors that will work perfectly for this feature! The two motors will sit under the upper corners of the playfield. The bottom center of the playfield will sit on a ball bearing and allow for adjustment left or right by the upper motors (since you only need three points to define a plane).