GUI Graph to Display BPM,Pitch etc

Hello .
 I felt this feature would be helpful to me and wanted to know the genereal opinion. If people would actually use this.
What I had in mind is a removable widget int between the current song list table and the samplers ( Will take up about 3-4 colums worth of space from the library songs , which I dont think should be significant ? ) that shows graphically what the tempo/BPM and other parameters of upcoming songs in the current playlist are.

The major help this will have , which I think in related to autoDJ
* When the DJ is say at a stage where he has shifted most of the controlls to the autoDJ which is randomly adding tracks, he can see the tempos and other parameters of the upcomming tracks in a glance and override the autoDJ if required .

* The graph will also show where the current gig is going interms of the track , i.e how much time I have till some slower songs are comming , should I delay it , should I hasten it etc.

* This widget can be as a visual sorting aid for playlists and crates . And this will help in selecting tracks better.

Im not sure If this , if deemed a good feature is doable . My assumption is that since we can draw waveforms we can do this as well.
This will be used along with featuer request in bug #1100882 . Coupled together , both of them becomes a very good visual aid to the user.

Please comment on the usefullness / modification / suggestion etc.