Snaps for lockdown bar
Screws for securing backbox
On/Off switch moved to the backbox
Microfine wire harnesses
Virtual Monkeys
Wood screws instead of bolts and tnuts
Zero innovation on hiding the wiring on playfields
Spotlights
Using plastic substrates instead of 3d sculpts(AC/DC cannon for example)
Tiny lcd screens
Topics limiting the response to a single item