I worked at the Playland Arcade at the Minnesota State Fair this year as a tech. I was amazed that so many newer games use a PC or a modified PC at the core... Star Wars Starfighter, Target: Terror, Beachhead 2000, Outrun 2, Ring Riders, and the incredibly cool Ballistics to name a few.
It'll be interesting to see what happens when MAME gets around to these. What will need to be "emulated"? Just the dongle? Will MAME just be a glorified front end to launch some of this stuff? It'll be interesting to see...
APf