Nintendo's 3DS wowed audiences at its unveiling this summer.
But without an always-on internet connection, the hand-held gaming device -- which displays 3-D images without the help of glasses -- could be at a disadvantage in the face of smartphones equipped for gaming.
An important social feature of the 3DS, called SpotPass, lets players battle each other over the internet, comparing high scores and making the games more interactive. The problem? Players will need to be in the range of a Wi-Fi network. Otherwise, they only can use SpotPass with friends who are close by.
This may not sit well with U.S. consumers who are used to being able to play games with friends across town or on the other side of the world. Wi-Fi connections are not as common here as 3G networks, which many phones use to connect to the mobile Web.
Nintendo has traditionally been slow to adopt online gaming. In that area, its GameCube system lagged competitors at the time. But web features play a major role in how Wii owners use the system, and it has sold more units than any home console of the current generation.