The video “proves” very little in terms of fine game control, comfort, accuracy and such like, but it does show one thing. The relative speeds of the game on both devices is pretty much identical (or at least down to the driver), the graphics are thrown around the screen in a similar style. If this was a strict test, I’m sure colours could be balanced for the actual view, but the point has been made.
Are the N8 and Symbian^3 suited to gaming as much as other platforms? I think the answer is yes.