For anyone who might think the same thing:
1. This is not going to happen anytime soon. 2. The tools they use, proprietary or not, are better than blender. I know everyone loves to rally around open source software and Blender has benefited lots of people for a variety of reasons, but high end visual effects is not its place right now. 3. The large 3D programs are actually used by an enormous amount of people these days, not just the big VFX companies.