I think eventually we will see Booker T in the main event sometime in the future, who knows who his opponent will be...I think TNA realized they had no need to push him straight to the top, when they had a proven, solid champion in Kurt Angle. Plus, I think they also figured that would mess up any long-term plans for their other title contenders (AJ, Joe, Cage, etc.)...
I think he fits in fine where he is at now. The program with Robert Roode is decent with some decent heat in it. I think Booker is happy where he is, he is probably more than happy to give the rub to the younger guys in TNA...he has spoken of them highly many times...But, I wouldn't rule out TNA having him chase the belt...