At some point, I can see a blending of the two programs if you get it. I am very partial to the Bryce interface though. Its got a wonderful entry level look and feel to it. I agree that MW has more advanced programming to it. The terrain and texture generators are superior in MW. Using OpenGL is also a good thing. The downside is the complexity of the MW interface. Also, being able to compose a scene on a smaller scale such as Bryce is very convenient. I wouldn't want to lose the ability to import mesh and arrange the scenes like Bryce offers at the moment. And the lighting lab in Bryce is probably the main reason I still use it. Would be interesting to see what you have in mind.