I don't think that the Vita will even get PSP sales numbers.
When Vita arrives the hardware power is outdated from even mid price smartphones. The PSP had some "cool" and high-end flair around them. Vita obviously don't have this advantage.
The 3DS has the biggest IPs (Pokemon, Mario, Layton, Zelda, Dr. Kawashimas and even Resident Evil, Metal Gear & Co). Games for all kinds of gamers.
I think there is no place for an new handheld between smartphones and 3DS in the future.







