Conditional game objects / components by platform

I've figured out conditional compilation for scripts based on platform, but I'm wondering if there's any similar support (or planned support) for conditional game objects & components?

This would be very useful for building cross-platform games. For example, I'd like to mark my high-detail models as "Mac only" and the LODs as "iOS only". Or have a depth-of-field image effect for Mac only, etc.

I suppose you could do this by enabling or disabling game objects at runtime using conditional scripting, but then you would still potentially be loading high-detail models into memory first, which I'd like to avoid.

You can load low or high poly versions of a mesh by prefabbing each one and spawning the correct one per-platform.

See an example in this post: http://forum.unity3d.com/threads/108637-MultiPlatform-ToolKit-Multiplatform-development-simplified.?p=727256&viewfull=1#post727256