I'll hold you to that. Its been a heck of a job implementing it :)
Track to track routing is a bit of a misnomer. There are multiple parts to this feature that we are working on.
1. Track to track routing and bus to track routing
2. Virtual input port recording. Tracks with virtual input ports will be recordable just like tracks with hardware input ports.
Today only synth tracks can have virtual input ports. In this new feature virtual ports will exist for inputs from other tracks and buses as well. These inputs will be recordable as well.