To answer that, here is a 450,000,000+ triangle, 16k resolution render of the entire world of Azeroth, complete with buildings, cities and more.
A lot of areas required special work, such as terra-forming Ghostlands (and above) onto Eastern Kingdoms, or compositing the new Silithus phase into Kalimdor.
There were a few complications, but despite having plans on how to fix them, I couldn't realistically allot any more time to this so it ended up getting left out.