Meh that might have worked for half-life when Gman did it. http://www.youtube.com/watch?v=ll08ktN6Y24 BUt the comercial for Brink should show the full parkouryness of the game.
It definitely should NOT show the full "parkouryness" of the game. The more emphasis tat is put on the SMART system, the more people expect, then you have players ranting and raving because Brink isn't a parkour sim and about how they can't do backflips and this and that, totally misunderstanding the concept of the game and getting mad at nothing.
As big as the SMART system is, it's really quite simple. It will become effortless and second-nature for players, and many of them will think nothing of it.