the days of pocket-able portable gaming devices (which don't exist anymore, they're multimedia devices now) is pretty much over.
as explained above, cell phones took over the pocketable realm. if people are okay with lugging around a laptop or a tablet, then they'll be okay with bringing their bulky (IMO) 3DS or NGP.
in fact, an NGP would be smaller than the tablet alternatives a lot of people are looking for, so the more features they can pack on with it's supposed app support the better. let's see some hulu, netflix, competent web browser, and some useful apps like amazon, gamefly, google reader, etc. i would be able to do all of my connected tasks on the go regardless of how much free time i have, and i wouldn't have to deal with bulk or skimpy features.