I think it is a great new direction for BIAB and adding greater flexibility overall for the program. The RealTracks have been a fantastic addition but there's plenty of life in MIDI and obviously editing MIDI-produced tracks is much more straightforward. With high quality sound modules, MIDI keyboards or even higher quality VST instruments now available I am sure they will compete and sit alsongside RealTracks very well. I am also sure they require a huge amount of skiled programming and expert playing to produce.