wonder how i go abotu doing this? i assume a PC with an embedded OS, or a quick boot OS. something that can emulate mame/nes/snes/atari2600/the megadrives and saturns and hopefully an n64 and psx. it would have 4 xbox controllers AND a place for 2 joystick/buttons in the case, like an arcade machine. ofc only the games i own would be used plus i could band my ps3 into this aswell.
PS3 and Xbox in a arcade dont bode well together. best to avoid them. As for OS you can either go for a linux distro that can handle them and boot off a CF card in under 10 seconds or Got for a skinned windows xp System (boot time longer) and then a front end such as game ex ... You have many Options to chose from for doing this. Allso have you plans for you Controllers. If you need more details help with any thing just let me know and ill fire up web sites that can help you archive your goal.