Sun roofs are common today on most make and models and certainly for the BMW 3 series. So will Tesla offer: -Optional Pano roof? -Classic sun roof? -Scaled down pano room? Perhaps something similiar to my wife's VW Jetta Sportswagen TDI with lots of glass, limited opening but without the railings since they will cause air drag. -Would definitely like to see the option to easily attach roof railing/rack which is not an option on the Model S without the pano roof. That seems like an omission which Tesla should address this time around.