I created a video that demonstrates the standard keyboard and mouse controls that seem to be used in the alpha videos with keyboard and mouse. Since I can't and/or not allowed use alpha, I demoed it with Guild Wars 2 using a tool that shows my keystrokes and mouse clicks.

I hope this video helps non pc gamers understand that it is not limited. I doubt SE will push this onto controller users because analog sticks are best to allow your character move in all directions.

WARNING: I do use backpedaling.
Standard MMO Keyboard and Mouse Demo Using Guild Wars 2