IGN has written an article with details of Nintendo's upcoming 3DS handheld console, you can check it out over here. One of the interesting things the site heard is that this new handheld console will be far more powerful than the Nintendo Wii, in fact, the site claims the processing capabilities will be close to HD consoles like the PS3 and Xbox 360.
How powerful is the 3DS?
Nintendo has not revealed any specs for the 3DS system, but expect it to well surpass the Nintendo DS in visual and processor capabilities. To provide stereoscopic 3D effects the system must have the ability to render each game field twice, one for each of the player's eyes, a technique that will require significant horsepower to produce.
Several developers that have experienced 3DS in its current form have reported, off the record, that it has processing capabilities that far exceed the Nintendo Wii and bring the device with abilities that are close to HD consoles such as PlayStation 3 and Xbox 360.