However, there is one thing the DS had that the 3DS does not have yet: great games.

FORBES: Did Nintendo Just Screw Up the Launch of Wii U?

The NES, SNES, N64, Game Boy and DS were all big sellers in one way or another, so why would a product come along to give them so much trouble?

FORBES: The Only Problem with Nintendo's 3DS

One difference from the previous generation DS is the addition here of an analog button.

FORBES: With 3DS, Nintendo Pulls An Apple

Nintendo sold 47 million units of the DS line of systems, which all have two screens, with one being a touchscreen.

CNN: Mark Milian