Gaming systems are big for the holiday shopping season and for kids, teens and adults on the go portable systems are even more appealing. Not too long ago Sony made a few changes to its PSP portable gaming system. Today we are going to look at the new slim PSP and compare it to the old PSP to see just what is different about the two systems. If you are thinking about getting a new PSP, read on for details on the new slim PSP and some comparisons to the old PSP.