Ross Miller at Polygon:

The interface is simple enough: once connected to your Xbox, the user can tweak settings and add songs to the queue / create playlists. You can also set up a shopping cart of songs to purchase, but the transactions have to be finalized via the Xbox 360. The tablet interface we played with worked very well, but it’s clear that the design is optimized for mobile view. The Dance Central series has always had a fast Kinect-based gesture system for going through the menus, arguably more efficient than Microsoft’s own “hover hand” solution, but this is even more convenient. It’s a simple but very convenient use of a second screen.

I hope developers are taking note of this. I want to see this kind of implementation on Wii-U and Xbox Smart Glass games. Especially if we get a Rock Band 4. The biggest time sink when playing music games is waiting for someone to pick a song from a list of 700 tracks.

Yes, my Rock Band library is 700+ tracks large.