this article appeared in Gameshout.com
"Nintendo has filed patents for a technology called displacement mapping, which seems to refer to the Nintendo Revolution graphics
Displacement mapping is a technique that is used to render detailed surfaces while successfully simultaneously keeping polygon count low.
In regards to the technology, Nintendo has filed a total of two patents. One of them refers to a specialized hardware for vector operations, optimizing the graphics hardware so that the displacement mapping is computed efficiently. The other patent reduces the strain put on the CPU that is caused by rendering a 3D world in 2D.
The technology is not new but Nintendo is patenting its particular usage in Nintendo projects such as the Nintendo Revolution.
It is believed that, with the power of "displacement mapping", Nintendo Revolution can achieve better graphics than the XBox 360 with much less power. Basically, allowing the Nintendo Revolution to advance a bit farther than the 360"