Due to the built-in power supply, Sony will be able to manufacture the new PS2 at a lower cost and therefore be able to offer the PS2 at a cheaper price. MCV state that the console will retail at approximately $99 in the US and £75 in the UK.
The Playstation 2 is still selling well and, according to the ever-reliable Wikipedia, has recently passed the 120 million mark in global sales.
Now we know why Sony didn't include PS2 backwards compatibility with their latest PS3 model.
Sony are yet to confirm the new PS2 model.
Source :: MCV