Should Microcosm show the real identity of users?

I'm not really that bothered. I'd prefer to use a pseudonym, but if people want to sign up with their real identities it's up to them.

It would likely be a site option, the person who administered or created a site would get to dictate whether real identity would be required on that site.

Only on sites where real identity isn't required would you individually have the choice to out your real identity (by using that in the username).

I just notice that this topic have zero view despite several people reply, what up with that?

It's been said a thousand times before, the view counts are updated periodically for performance reasons.