It's funny the way the power of imagination works when it comes to the advertisment of equipment like this. I mean, you see the footage on your normal, flat screen, but because you know it's VR footage it seems so much more immersive. It's the same when they show ads about TV's on TV, and the picture you see on the TV screen in the ad is so much better than the picture on your TV screen... although you see that screen on your own screen, so how could it possible be any better than your own TV?
It's a bit like hypnosis: "Now you see this whale in real life size", and when you know that, that is what you see, and it's so awesome. Even if it's still on your tiny computer screen, and you're not wearing any VR goggles...