The Arduino has been around for some time now, and the general consensus is that it isn't really the right package for anything graphics intensive. The Gameduino 2 is changing that by adding a dedicated graphics processor.
For many who build quick prototypes, the Arduino is the default starting tool. However, there is a divide that appears if you want to develop software that has intense visual attributes. You generally would have to go to using a full computer with a graphics processor (or possibly a somewhat expensive cellular phone) for development. However, the Gameduino 2 brings the graphics processor to the Arduino.
The Gameduino 2, a complete mobile gaming addon, plugs into the Arduino like a normal shield. It includes a 4.3-inch touch screen display, a three-axis accelerometer, a microSD slot, and an onboard FT800 graphics processor.
That processor really bumps the system's capabilities. It allows for up to 2,000 sprites on the screen at a time, smooth sprite rotation and zoom with bilinear filtering, 16x anti-aliased line drawing, and jpeg loading in hardware.
It would seem as though many are excited about this project. The Kickstarter campaign for the Gameduino 2 has only just begun, and the backers have already doubled their funding goal.