Laptops are great for small projects. Naturally you would not put a 15 or 17 " laptop screen in a Nintendoh cab (well you could
) but to put a small puck like PC in a full size cab and drop 3 bucks on it when you can have a decent desktop PC that can play anything for half the price, even with a monitor. Makes more sense.
Raspberry Pi is another disappointment. You have to buy licenses to play back mpeg2 and it is real fun and games getting audio through HDMI. Never mind playing anything pre .34 era Mame. Its a toy.
I can see that puck sitting on my desk with two cables for an awesome desktop PC. Not wasted in a cab or a control panel.
I have two 1.5 Core2Duo ITX PCs I got for £20 each that could do the same job, but they do not look as nice as that little puck.
Same could be said for a Mac Mini. Would you stick a Mac Mini in an arcade machine?