It's dead for expansion into anything but children. Some little kid will hit up his parents for a game he'll only play a few times as it only costs like 10 bucks. But some 19 year old who has to work for his money wont buy anything for his Xbox beyond the bread and butter of gaming. No one (really) besides 6th Graders and lower play on the DS. The DS is generally crap compared to a computer that people generally already have. You may as well download Pokemon games for free on the Internet rather than just play it on the DS.
The 3 DS has MGS:3 in 3D (somehow expectedly) on it and I reaaaaallllllyyyyy want to get it! Unfortunately I am spending £380 on a computer.