Interesting. This reminded me of a thought that I had when I was watching Avatar in 3D: the 3D effect was always focused on a specific part of the scene, and if you focused your eyes on a different part, it looked blurry.

After I thought about it, it made sense: they can only create the 3D effect for a specific focus, otherwise they'd have to provide an individualized effect for every viewer.

I wonder if/when we'll see a solution for this.