Pinball emulators are usually running on a PC, but if you are the crafty type, you can do what this guy did and create a 1/3-scale pinball machine called the Hot Touch Arcade. The emulator is in the pinball machine itself and powered by an Intel Atom processor.
There’s also an NVIDIA graphics card, and it runs on Windows XP. The actual pinball game area is displayed on a 19-inch 16:9 LCD display, and it includes a physical shooter, flipper buttons, and a coin slot. Pretty nice!