Unfortunately there hasn't been much in the way of follow-up since that article came out.
On the plus side though, one consequence of the recent HTC vs Apple court case has been that the S3TC patent (S3 texture compression) appears to have been judged invalid in the US. That is something that has been holding graphics back for years on Linux, and something that DirectX does very well. Would be good if Silicon Graphics would clear the air about the floating-point compression patent now, because it was added to Mesa 8.0 but disabled by default. There's also Mesa Support For OpenGL Geometry Shaders, which means OpenGL is a bit closer to having the complete 3.2 spec.