Anyone heard of these?

http://www.voxamps.com/jamvox/

Seems like another amalgamation of modeling, audio interface, and DAW, but with two notable exceptions:
1. It comes with speakers built in
2. You can supposedly drop out the guitar or vocal track of any tune you load into the software

Some guy at work was interested in them, so I thought I'd see what you guys think. My initial thought is that there's probably not much advantage to this over some combination of an amp, pedal, looper, and/or backing tracks, but who knows?