No doubt by now you've had your question answered by inspecting a smart at close range. The panoramic roof is a darkened transparent roof which is easy to see out of and lets in plenty of light, but it's difficult for someone outside to see into it, not that it makes much difference as nosey folk can look thorugh the other windows.
The sliding screen is indeed fabric, and blocks out most of the light.
Thus far I've put 72.5 miles on my car, and I'm still getting used to the ato-manual transmission. I can't drive it with the stereo on very loud, as I need to hear the revs in order to change gear.
It's drawn lots of attention and comments, the usual ill-informed ones about safety and the classic statement 'it wouldn't be much use for a family'...