zexen_lowe on 29 December 2009
I think you're reading too much into this. Maybe they wanted to make a PSP, but also showing how it could work for DS too (after all, the buttons are the same). Maybe they wanted to keep it ambiguous, using it in the PSP but also showing how it could be used in a supposed, future, not-yet-real handheld device. It could be thousand of different things, and not necessarily mean it has to be a PSP2
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