There is a big problem with all this 3DS stuff at the moment imo. and thats the effect 3D has on the eyes. 3DS is not meant to be used by kids under the age of 7 because apparently it can interfere with the development of eye muscles.
i'm an adult, with pretty poor eyesight as it is, i'm going to be very sceptical about a device that can affect your eyes. especially since prolonged 3D is said to cause strain on the eyes for anyone. my point is that i think parents will be concerned (i certaintly would be).
i know all 3DS games can be played without 3D, by that does defeat the object imo. so i wouldn't count PSP out of the runnning just yet. i'm uncertain that steroscopic 3D is the future of entertainment at the moment and i wouldnt count 3DS victorious just yet.