PSP 4000 Unlikely

PSP World writes:

"There has been a lot of baseless rumor and speculation going around over the past week about the possibility of yet another revision to the core PSP hardware. While we feel that a PSP successor or PSP2 is definitely in the cards based on recent evidence, we find no evidence to suggest a PSP 4000 revision. In fact, there is very little reason for Sony to invest time and resources in improving the current generation PSP hardware any further than it already has."