I bet Qantas will allow EK to fly A380s from Ozland to the US.
Would be interesting to see how the range on the current (or near-future) A380s will limit EK's ability to serve parts of the US from Asia. I doubt EK will be using the A380s to stop over in Hawaii due to range constraints... Although Hawaii would be a nice crew layover!
I am guessing HKG-LAX or NRT-ORD are probably max range examples on a fully-loaded A380 - no?