Christopher Blizzard's (Open Source Evangelist at Mozilla) thoughts[1] on standardizing Canvas 3D, taken in conjunction with what relevant people at Google are saying[2], makes it look like Google is just really eager to get people using "3D" on the web.

[1] http://www.0xdeadbeef.com/weblog/?p=1223

[2] http://arstechnica.com/software/news/2009/04/google-releases...