The DS is a weaker machine than the PSP but it still has a few tricks that can be used as bullet points on the back of its box. Everyone knows about the second screen, the touch screen, and the wireless. Frankly, if it were up to small features, a DS list wouldn't get very high. But those things aren't what make the system worth owning. The DS is ultimately popular with gamers because of its games. Any list that wants to convince a gamer to buy a system should focus on games.