I slightly disagree. Due to the simple fact of biology there will be certain differences between how men and women go through their daily lives. This has to be recognised. The question is the extent to which privacy is necessary. I think the answer to that will always depend on the social attitude one applies to such situations. Perhaps by the 21st Century, to put it bluntly, we'll be shitting and pissing ourselves in front of one another in spite of gender, because it's no longer seen as a taboo to do so. Conversely, perhaps the view will be that the diversity of biological gender differences will be such that division is still arguable.
Well it hasn't happened yet, I think....Is this something we should keep an eye out for?
Why not? After all, it's natural biology. Why should we be embarrassed by it?
Wait... Were we not supposed to be doing that?
If you're thinking of the episode "Tapestry," then I believe that those two were just friends with Picard. Although the female friend did spend the night, that wasn't exactly a roommate situation.
It will likely continue as long as reproduction is necessary for the continuation of the species and boys and men are visually and involuntarily wired for quick and opportunistic arousal.
There's the social mores of the individual to consider too. Officers and crew are going to be coming from a lot of different species and different cultures, the expectation that they're all going to have one culture is really not a expectation at all.
