That mix may change somewhat as Land Rover refreshes some models and replaces others. Expect to see both the LR4 and the Defender receive serious overhauls in the near future.
Even so, it will be some time before he next-generation Defender bows, and whether or not it looks anything like the DC100 concept above remains to be seen. From what we've heard, the new bruiser won't bow until 2017 at the earliest. In the interim, U.S. buyers will just have to continue to look wistfully across the pond.
UPDATE: Since this report went live, Land Rover has commented to us that its "intention is for the next generation Defender to be engineered in a way that would allow it to come to the U.S.," but that there are still many obstacles to face before that happens and its reintroduction to this market confirmed.