Sony's XMB may be a bit of a RAM hog, and Microsoft's Project Natal will require about 15% of the Xbox 360's resources. But the new PlayStation Move controller? Its footprint looks light.
While Sony has not come forward with complete CPU footprint information, they've stated that PlayStation Move requires an "insignificant" 1-2MB of RAM.
But like we said, CPU processing has plenty to do with Move's digital footprint, too. And just because the Move's output can be processed in "under a frame" doesn't mean the graphics, physics and overall experience of said frame aren't diminished.