Features: G9 vs G12 vs G1X

I own and use the PowerShot G9 and G12 and plan to get the G1X.  Below is a rather quick comparison of the specifications and features available in the G9, G12 and G1X.  I did not attempt to list all specifications and features, especially those that were essentially the same or those that I felt were relatively insignificant.  Cells colored green indicate a specification or feature that I felt was significantly desirable or improved in comparison to the other cameras.