If you look very close on the picture (min. 0:38) on this video which was released in 2008, before launching X6, you can see the new led tail lamp which will be introduced this year (along with new white led head lamp)
YouTube - ‪bmw x6 new video‬‏
I'm pretty sure that is the new facelift tail lamp because it has the same design like 2010 X5 facelift: two red led bars of light, one shorter-straight and the other longer-comma.
Anyway my impression is that every car maker they know before how will look the facelift version, they only wait 3 years to launch it.
PS: In the same photo, notice the different bumper.