They have been discussed at various times in the forums, but it seems to have gone cold recently - I guess with 0710 coming. From what I gleaned from those discussions, though, it sounds like a huge task because of what the orbiters have to be able to do with things like regens and so on. The discussion moved towards a complete re-write, so that all those things like skins you mention, dynamic content, and as importantly (to me!) the cooler graphical effects.... yes we have alpha blended (sometimes!) but really the rest of the interface is completely static, no transitions, fades, wipes, etc, most of which, ironically, are simpler graphically than alpha blending!