Dubstep, DnB, house ... Why only these 3 genres, most of the top djs (http://www.djmag.com/top100) play trance, deep trance and electro. Seems like a weird choice to me.
its just a proof of concept and i think the devs are aiming to dump tons of content (that can be accessed within license) into the sleek and efficient usability of turnchannel.