This is more of an expansion on the law rather than a new law. Microblog type services have required real ID registration for a long time -- you must provide a national ID in order to access, however, the display name did not (and still doesn't) have to be a real name.
The news here is more about the affect on impersonations...which I don't entirely see as a negative. People should not be allowed to impersonate others or organisations online in any country, and I believe many countries have laws against this already. In California, for example, it's illegal - with heavier repercussions if one can prove intent to harm/defraud/defame/etc...
So, for any of those who outrage against this type of thing, get over it.