It certainly wont be less than 6 years. I suspect we will see a refresh for MY2012/MY2013 and a new model for MY2015/MY2016.
ED Vehicle: 2009 F02 750Li | Black Sapphire Metallic | Black Nappa Leather | Fineline Matte Wood Trim
ED Tour: Aug 25th - Sep 9th 2009. (Itinerary | Trip Report | Route Map).
ED Progress: Welt Delivery Aug 27th; Drop off at Paris Sep 8th; Redelivery October 30th.