PS Vita has been out for before Christmas in Japan and Hong Kong. You can get your hands on the import sets in Singapore. The specs are high-end compared to the Nintendo 3DS and one main feature that I noticed is that the "PSP" finally gets a touchscreen (in front and at back too) and a capacitive one for that matter.
This means you do not need a stylus unlike the DS family and just like the iOS family of iPhones, iPod Touches and iPads. I believe and hope that the next Tag Force game will be re-designed to be played and controlled by fingers and when that happens, it should not be too hard to port that design over for iOS!
