
This sort of thing is not new to Sony, as they did the very same thing with the original Playstation, dubbed the PSOne and again with the slim-line PS2.
There were hints that the new fangled PSP could feature something fans of the handheld have screamed about since it's inception. Onboard storage of up to 8Gb of space and perhaps the inclusion of the Eye-Toy addon. There were no official comments however on exactly what changes will be made, only that a change will come.
Source:
The Register