Is a whole new experience. Every game just runs so smoothly with no slowdowns or crashes. Asphalt 4 used to run choppy and crash often. Not so with the 3GS. Guitar Rock Tour could've been fun, but ended up being a disaster on the iPhone/3G because the lag caused the timing to be way off. With the 3GS, the timing is perfect and is actually enjoyable to play. The Sims 3 animations are so smooth and fluid, as is Need for Speed. It bothers me a bit that these games were designed for the iPhone/3G yet the run THE WAY THEY SHOULD on the 3GS.