Not sure about the feature comparison of Direct X and OpenGL.

What we have experienced is....

Direct X Platforms

PC
XBOX
XBOX 360
Zune (?)

OpenGL Platforms

PC
PS2
PS3
PSP
Nintendo DS
Nintendo Wii
Mac
iPhone


Now it becomes a developers preference as to where they want to spend their time and energy.

Direct X is very Microsoft Centric, OpenGL offers more platform choice.

Since the main open systems for Indies is the PC, Mac, and now the iPhone. It really is a toss-up....

Agreed that most hobbiest's buying a $200 3D engine will have PC's and not Mac's. That definetly is the market 3DGS is going for, I am not so sure about Unity. Seems to me Unity is doing a good job finding biz other than the Window Hobbiest's.

Windows 3D engine land has many competitors. Bigger Pie, lot's more pigs eating at the troff...

Ken