1.) Largest world in any MMO Currently out or in Production (Twice as large)
2.) At the same time, seamless world with NO Loading screens whatsoever. All of it handcrafted in all detail.
3.) Advanced AI that will make Monsters have their own "societies" Player actions will have effect on the creatures ecology (making it possible to actually eradicate certain creatures from an area).
4.) Ship combat with fully walkable ships, each crewmember manning guns and whatnot.
5.) Mounts that are not just mounts but companions with their own AI.
6.) Intuitive Skillsystem with 500 Unique skills and 500 Spells at launch alone.
7.) Crafting System that will put others to shame, with -EVERY- item in the world being craftable.
8.) FPS Style Massive Combat with 200 people on screen while still getting 60+ FPS from an average computer with 200+FPS during normal loads.
9.) 10000+ players on one server, in ONE world, no zones, no nothing.