There won't be another handheld who will beat the PSP!

[Paatar]

DS still sold close to 160m. I can guarantee with the releases like MH4U, LoZ: MM, Codename STEAM, Bravely Second, Fire Emblem If, Final Fantasy Explorers (in the west) AND the next Pokemon Gen (which they have always done two gens per console basically) I am pretty confident that the 3DS will surpass the PSP.