Gameduino is an add-on for the open-source Arduino hardware platform, created to facilitate the creation of 8-bit video games. They’ve already passed their Kickstarter goal. What’s cool about the Arduino is how low-cost and accessible it is. You could, for example, create a new 8-bit games console on this thing. With a built-in store.
I’m hoping to see someone do a panel on this bit of kit at the next GamerCamp.