Considering that this "landing page" is only an image and a button, that fact that no JavaScript or CSS was used isn't very impressive.
Not impressive at all. It's just interesting that the designer tried to use technology from 1996 to make something with taste in 2013. However, it might be the simplistic way to create animation that can be autoplay in iPhone Safari. Using video needs users to click play to start.
Even the background color is done by image XD
What about SEO?
Ain't nobody got time for that! At least not those that did do this.