iPod touch/iPhone will never tap into the hardcore gamers' market, just like Macs will never tap into the hardcore gamers' market. However, it can become decent enough that the average person will just make do. Again, not many people actually carry around a gaming device because most people do not play games enough to justify the trouble. However, most people would listen to music, watch videos, look at photos, browse the web or make calls enough to justify carry around and iPod touch/ iPhone. Those are the majority of the population, and those are the people that Apple is trying to cater to. To them, iPod touch/ iPhone is a decent gaming device and Apple have a lot of potential in this market. People who don't play games often may have a hard time justifying the purchase of a DS/PSP, but an iPod/ iPhone could be exactly what they need. Some light gaming on the go, yet it would be useful for everyday life. It can become the best selling mobile gaming device, because it appeals to a larger market. Even if it doesn't replace a DS or PSP, some avid gamers may stop carrying around the DS/PSP as much because the iPod/ iPhone satisfy them enough while they're waiting in line.