If the UN gains control of the Internet, we can expect our little experiment in instant communications to die an ignoble death. Nice and pithy, this explains why.
Also, it's ironic that the UN would express concern that the US would abuse its power (not having done so in 35 years) in maintaining control over such aspects of the Internet infrastructure as the root DNS, when already many UN members manipulate the Internet inside their borders for political reasons. Consider that China and Iran belong to the working group calling for UN control, two nations that have demonstrated numerous times in the past their abiding love for freedom.
The US created the Internet, and the rest of the world has gone along for the ride for decades now. Let's leave it that way.