Observe brief snippets of Paper Mario and Mario Kart for the 3DS, and listen to music from Pilotwings Resort. http://www.nintendoworldreport.com/newsArt.cfm?artid=23500 At E3, the 3DS versions of Mario Kart and and Paper Mario were demostrated in non-playable form with short videos. Each demo displayed GameCube-quality footage with some very impressive 3D effects, such as boulders rolling towards the drivers in Mario Kart and fishbones popping out of the screen in Paper Mario. Here is a tiny sampling of gameplay footage from both Mario titles.
The quality of music and sound effects in 3DS games have also been noticeably improved. Mario Kart 3DS featured a rock remix of the title theme to Mario Kart 64; likewise, Pilotwings Resort had some wonderfully relaxing music with sound effects straight out of Wii Sports. Here are a few 3DS audio tracks for your listening pleasure.