I'm suspect about how there are no movement controls. It's all prescripted. There aren't any physics either. Not impressive.
...you do realize this isn't a game, right?
There is nothing compelling about WebGL except that it is interactive.
If I wanted a non-interactive scene that repeats, I could do it in anything and upload it as a video on youtube.
Dynamic interactive 3d is the exciting thing about webGL and it is the the thing missing from this demo, so I too, am disappoint.