The past couple of days I've been using a tool Marlamin created to export models from the client and use them in other engines, such as Unity 5 and Unreal Engine 4.
Similar to how I made Dark Portal login screens a year ago, I wanted to expand it and use it to improve my knowledge in those engines, so I've started slowly importing Dalaran into Unity 5.
As of right now, a lot of the models/environments can be "easily" replicated in Unity 5, but things, such as animated doodads and others can't be exported directly from the game as of now, but I could always use the actual models to animate them myself in order to achieve a fully intractable environment.
I consider this far by done and still work in progress, but wanted to share some screenshots of a version of Dalaran I've been working on.
If anyone is interested or can suggest a new area/city that I can try importing in Unity 5, let me know here, once I'm done with Dalaran, I might try to do Orgrimmar due to the amount of metal in it, it can look very nice with reflections on.
Technically there's also a Executable version of the scene I can provide, but due to the lighting being currently dynamic while I'm playing around with it, it runs at 1/2 FPS for more complex scenes such as Dalaran. Once I finalize and add everything up, That would be improved.
If you have any questions or suggestons, let me know here, I'm open to feedback.
tl;dr: wow with bumpmaps n smoothness
edit: I'll edit in additional stuff I make here on the main post, newest stuff being on top:
Feb 2017:
Dec 2015
+ Day Version: