missing the point
The point is that when the UN runs ICANN the members of the UN - ICANN committee can direct the techs to remove any name from the registry.
The sad fact is that there are a whole lot more countries who would conspire to silence a lot of voices than there are countries who believe in freedom of expression.
What will this look like? When you type in TheRegister.co.uk you would be directed to whomever UN-ICANN said is the owner of that domain, which could be SomeNastyDictator. Who could then demand to know why you surfing heretical web sites and not at prayers.