I've often wondered about something like this, and I hope you'll forgive me my musing on the subject.

The mind is a truly fascinating maze when we're left alone with it. So much of the day to day of living envelopes us that very few people spend time to just think about things. I wonder if, as humans have more and more time to themselves, such "self identifications" might not become more and more prominent, even fantastical. And so long as none of these actions are harming anyone, and these people still manage to function and maneuver through society, I wonder whether or not we'll even care that much. There's a limit to how much I can be dumbfounded by a concept until, after hearing about it ad infinitum, I become accustomed to it. Who's to say that someday, perhaps far off, such abnormality becomes commonplace?

I honestly wonder what our world would look like if we had that degree of diversity. Especially once we start mucking about with genetics. I'm reminded of the gene splicing from "Batman Beyond" and as time goes on I keep thinking to myself: "This could very well be the future. Not necessarily the near future, but the future."

And that's astonishing to think about.