In addition to the Surface-style smartphone that Microsoft is rumored to be developing, the company is also thought to be creating its first handheld game console.

FORBES: Microsoft CEO Adds Credence to Xbox Tablet, Surface Phone Rumors

Milton Bradley, a company then better known for Hungry Hungry Hippos than video games, has the distinction of being the first to introduce a handheld video game console with interchangeable cartridges with its Microvision.

ENGADGET: A Brief History of Handheld Video Games

NVIDIA's Tegra 4 powered handheld looks a lot like a typical game console, but it isn't.

ENGADGET: Project Shield won't be sold at a loss, says NVIDIA

Because of the differences in technology and controls we have got used to handheld games being quirky or scaled down versions of the console game.

FORBES: 7 PlayStation Vita Games That Break the Portable Gaming Mold