I think coin-ops are going the way of the dodo. The only games that really grab attention anymore are the Dance Dance Revolution series (got it for xbox, luv it!) and the MOCAP series (Police Trainer, Boxing). Other than those, PC's & consoles really are taking over the gaming market.
I'll make exception to the expensive, yet non-coin-op games.. NASCAR speedways, Battletech, and many of the motion simulator games. Just sucks they tend to come out to about $1/minute. Battletech, on the expert modes, can have a steeper learning curve than AH. Engage, cycle weapons, manage heat, manage generators, watch radar & manuver like crazy, route around damaged systems, all spread across 7 monitors. Definately my kinda game. Terrified to calculate how much I've spent on it over the years.