I'll agree it's somewhat refreshing compared to the standard design, but anything that requires a "scroll down" notice needs some further work in my opinion. The full screen background images switching from section to section is interesting but the left side being left column being taller than the right feels awkward and unbalanced.
Either way, nice to see that B.Gates is actively blogging and continuing his philanthropic efforts.
I agree with you. The fact that you have to tell users what to do next with arrows and etcetera is much the same as using narration in a movie. It works, but it is a little like cheating. Nonetheless, I like the evolution away from standard text on a page with a picture or two.