I'd say not only would windows be nice but the option to take down the roof as well.
Of course I enjoy driving far too much to ever give that up to an automated vehicle. I've been keeping a spider (MR-S) for a while because I really enjoy driving with the roof down. And even though the MR-S is used and beat up and mostly stock I keep it despite the fact my primary vehicle is a tuned GT86 just because it's a blast to drive an MR with the roof down.
If you ask me all these people who are pushing for automated cars should drive an 86/BRZ or an S660 or a Lotus or some other drivers car and see if they reconsider wanting to get rid of the "hassle" of driving. Don't get me wrong; certain automation can be good (EG: Subaru EyeSight) but at the end of the day the actual act of driving should be something enjoyable.