Quoted from markmon:

Every EM is the same stupid game. Put 3 pop bumpers in the center on the flattest possible surface with a bunch of misc targets and some crappy targets and add some chime sounds and you have a winner. Need another game? Change the artwork a little and call it a totally *different* game. I imagine EM's might work well to gut out for a virtual pinball cabinet. Or maybe you could lay some padding on them and use them for a bed. Who knows.
Of course you get people that claim that they require the ultimate skill etc. I guess people need to convince themselves that there is some reason to like them. EM's only existed because technology didnt exist to do better.