Zaphod
Galaxy President (former)
It was mentioned long time ago at the initial reveal that there would be 3 options; fixed glass, fixed metal, and opening sunroof. Of course this was way before the S went to eliminating the metal roof option altogether, so who knows what will ultimately happen on the 3. My guess is that there will be opening sunroof option sometime, but not anytime soon.I don't think the Model 3 will even have a sunroof option. As far as I'm aware, they're only making all glass roofs at first and then metal roofs. No mention of sunroofs.
Tesla did file a patent for a different sunroof opening mechanism that may be applicable to the 3.
Tesla is working on a new type of larger movable panel roof, applies for a new patent