The only way I could see the orrery adding anything worthwhile would be as an extension to the the current schematic view, a toggle that explodes it to the 3D representation. But this really wouldn't be much more than a cool looking toy as scaling would have to be squashed and mangled and expanded to get everything on the screen and at that point what is it for other than looking cool (I agree it would look cool)?
Systems like Sol with only one parent star would be easy to display in the orrery. Multiple star systems with many bodies orbiting each would be more challenging. This view scaling problem is what the UI design would need to address. With multiple star systems, when zoomed out so far that a system can't be displayed the main star alone could represent the system, with some notation or graphical key noting that there are multiple bodies orbiting it which aren't being shown. Clicking on the star could zoom the view in on that "local" system, and there could be a "zoom extents" button on the map to zoom out all the way showing everything. This same "zoom and represent" mechanic could be used to summarize any orbital data too small to draw properly at large zoom levels for both planets and stars.
It is certainly a task that is very doable, so the question of "is it possible" isn't relevant. The question of whether or not Frontier thinks it's worth the development time though, well we already know the answer to that as they don't have it planned at all currently. It doesn't sound like a feature we should hope to get down the road. Still, I certainly would love to have it, as I'd find it extremely useful as an explorer.