What can be done is what we call in the graphic business "window perf".
Its a self adhesive vinyl that has a white surface (for printing), perforated holes at a 50 or 30% ratio & black adhesive on the back. Many Burger joints use this on their glass windows, you can see out but cant see in (until your real close). It would work on the smarts roof, but would need a special overlaminate that would conform to the shape of the roof which is now available.
Its benefits would be to reduce the overall amount of light coming in by 50%. Leaving it white with no printed image would in theory reflect the suns heat, thus cooling the roof. Kinda like tint, but not.