News via dreamcast es
CubicVr is a 3D engine that runs on many systems and appears to have been ported to Dreamcast, including hardware acceleration.
Here are some videos showing operation Dreamcast:
http://www.youtube.com/watch?v=QXGoPDbv3wk
http://www.youtube.com/watch?v=OFMEAeUpCAA
The project is open source and apparently you too can download the source port to Dreamcast. The website of the project is:
http://www.cubicvr.org