This may have been mentioned before, but considering a WOW factor, how about a WOW! application?
For me the Amigas WOW! app was Deluxe Paint )and animation in particular) - a hell of a lot more fun than just playing games. After that came ProTracker and then eventually Videotracker to merge Pics/Anims and Mods.
If people have the MTV mentality how about an app along the lines of VideoTracker that merges MP3s synchronised with pics/anims/AVI clips/etc.. into a single standalone executable that runs on basic hardware? It would have to be fairly simplified and include a CD full of example video clips/pics/music/etc. The potential to store the finished work on Video/VCD/DVD and played without the need for a computer at all would appeal to the MTV inspired crowd (eg: Make your own video clip).