Adobe pre-announces (?) Photoshop CS3 Extended with support for 3D and motion video.

I don’t quite get it. I mean, painting across video frames is a very welcome addition, but… integrating 3D graphics? They can’t expect to integrate a production-grade 3D renderer into Photoshop, so that rules out any kind of graphics-intensive works; are architects and medical professionals an important enough market to add that kind of bloat to Photoshop? More importantly, exactly what will that really add to the users’ workflows that they couldn’t do before using Photoshop together with a CAD program?