I'm not a music downloading monster like some, so I personally haven't had any problems organizing and finding my music. However, for those who are downloading music every day (legally, I hope), I can imagine your music collection is getting quite out of hand. You probably can't even remember what songs and albums you've downloaded over the past two years. What's that High School Musical album doing there?
That's why this tool is in development. I haven't tried it out, but from the screenshots, it looks like there is potential. Although it looks like the screen can get cluttered very quickly, and with too many songs, you might just end up with a big bubble cloud. If that actually is a problem, it kind of defeats the tool's purpose since I don't really care about visualizing only 20 songs. But like I said, I haven't tried it.