It looks beautiful, but has anyone ever found 3D "viewing" of 2D interfaces to actually be useful?

I dunno, I've never felt a reason to use Firefox's 3D DOM view to debug anything ever, or that it would help at all. If anything, the 3D view just confuses things for me, not being able to see how things line up, etc.

I'm very curious if this is just novelty eye candy, or if there are people who have found this useful in real-life interface work, and what those situations were.