First time posting in the D&D and was originally going to post this in the College Football forum. Obviously much larger implications than football but the most likely immediate impact could be seen on the field.
From a football perspective, all three California schools in the PAC 12 currently have away games scheduled in banned states. The ban only affects contracts signed after Jan. 1st 2017 so those will still likely be played. But no doubt these schools would want games in Texas for recruiting purposes.