RE: What is 3D?
Yes and NO
Typically you want a min. static thrust of 1.5 times the planes weight.
A blender is a 3D maneuver that does not require unlimited vertical. I had a 25% Edge 540 powered with a saito 1.20. Very scale flight!! But it would blender well.
Like said before, there is a lot more to it than hovering and torque rolls. You just see this most b/c its the most eye catching thing to do. Plus its kinda hard illustrate a blender, waterfall, 3D snap, etc, etc. in a still shot.