One thing I've always wanted at a bowling alley is an instant slow-motion video replay of the pins being knocked down. Seems easy to do in theory, a Raspberry Pi + compatible camera could do this very easily, so long as you could mount it in a good locaiton. The only alley integration needed would be to tie into whatever sensor detects when the ball reaches the end of the lane.

* Mount a 60 fps camera pointed at the pins.

* Continuously record a short looping buffer in memory (5 seconds would be more than enough).

* When the ball-trigger fires, wait an extra second, then freeze the buffer and play the buffer once at normal speed, then again at 1/4 speed.

* Finally, restart the recording loop.

If it's a dark alley, you could use a low-light camera such as an Arducam with the STARVIS IMX462 (no IR-cut) and if ambient light is still too low, add a few infrared floodlights. Having instant slow-mo every time the ball hits would be a crowd pleaser, especially with kids and casual venues. If one of my nearby alleys had this, I wouldn't go to any other alley.