BMW's rear view cameras synthesize a top-down view of your car and the pavement around it. Quite remarkable to see in action.

http://www.xoutpost.com/attachments/x5-e70-forum/38502d12611...

This is not suitable for lane changing but I imagine creative use of cameras all around the vehicle and proper placement of LCD displays could make those mirrors look like dated technology.

I don't know what Tesla's implementation was but I am sure we can do better than mirrors with blind spots.