well SONY's biggest market for the PSP2 is Japan, and with Japan already feasting on the 3DS he doesn't want the PSP community in Japan to buy the 3DS and not the PSP2 that could come out later in the year.
So announcing now would mean that an large chunk of the Japanese market (mainly PSP owners) will wait it out for the PSP2 and the rest of the world will be be given the decision to get either the PSP2 or the 3DS which is looking to be the same price since Nintendo is upping the price due to excitement and the 3D screens being expensive. And if that is the case then SONY could have the upper hand offering the PS3 experience on the go where PS3 owners would buy and even 360 owner who wants the latest line up of PS3 exclusives without having to buy an PS3
Of Course That's Just My Opinion, I Could Be Wrong
