I would not mind more media capabilities in the DS. While already a great system with many owners, adding some media features such as music playback would be pretty neat to have. The DS would also need a harddrive for it though, or it could be an external harddrive made by Nintendo.

With a harddrive, Nintendo could also allow developers to make DLC for the games produced on the system. This would add more replayablility in the game and Nintendo would make some more cash on the side. The content could also be themed backgrounds for your DS or a new interface. Video playback would be nice, but I think the dual screens would be an issue with watching a movie.

With the DS, Nintendo has many ideas they could do with it and greatly profit from the ideas also. If they listen to the ideas of the gamers who own a DS, they could rake in some serious cash.

Some of your ideas are really good. Nintendo should definitely put some thought into putting an external hard-drive for DS as well as some jazzy touches to it's interface. DS is a very good handheld just not my style. I would rather play my PSP. lol

I own both, but I only use my DS for games and my PSP as a media player(until Dissidia releases of course). I think to gain more sells, Nintendo needs to do this WITHOUT it being sold separately(they will sell it seperately).