True HD Resolution: The game play was played and recorded in real-time at true 1080p HD resolution, not scaled up artificially. The animated lore part of the video is produced at 1080p resolution from the ground up. All assets are created at true 1080p resolution.

Animated Portion: The animated, pre-rendered lore intro portion of the video was done completely in-house. This was not contracted out to a specialty studio that produces high-end pre-rendered videos. All of the illustrations, animation, editing, and rendering was done at ArenaNet.

In-Game Portion: The in-game part of the video is actual in-game footage. It was rendered in real-time in the game engine and recoded live using video capture hardware. Nothing was pre-rendered. All models, textures, and other assets are actual game play versions. They haven't been prettied up for marketing purposes.

Maps are works in progress, and may change to better fit game play.

The team is working hard to make the game even more beautiful for the full release!

See the official website for all your Guild Wars 2 news! http://www.guildwars2.com/ (less info)