I thinks SaeedPhillipsInc has a point. I think they should stick with what they do best - 2D. There are too many great editors for 3D out there to start competing with (Unity3D, Unreal, Shiva). GS does 2D better and easier than the rest I know of and that's why I use it, but for 3D games I use one of the competitors and that would probably not change even if GS made a 3D editor.
Comments
-Money
or
-Difficulty
And GS is all about simplicity
And hard.
But it could be fun!