Given Nintendo's track record, even 2GB (I recall seeing that speculated somewhere) would be a massive leap.
Honestly, the whole concept doesn't sound too likely. It sounds like somebody who knows nothing about gaming got their carts and their DLC mixed up.
BTW, Nintendo's
specs for 3DS confirms the screen resolution going up. We're now at 320x240 for the touch screen and 400x240 (per eye) for the widescreen, this being up from the current DS's 256x192. 240 = half the height of SDTV = Resolution of PS1 MegaMan games (I know, pipe dream, but still).
So, PB would mean a sort of vertically interlaced image?
How would your eyes not notice only half the pixel columns are there?
With Nintendo's recently released
specs we now know that the answer is some horizontal dot pitch trickery. The system is designed, and screens appropriately sized, to render a 400x240 image, but since a different set of pixels is sent to each eye, the actual screen resolution is 800x240.
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