Bret Swanson and George Gilder have a column in today’s Wall Street Journal in which they argue that more Internet capacity will be necessary to keep up with movie downloads, gaming, virtual worlds and other fast-growing applications.

They explain that Internet capacity will have to increase 50 times in the next couple years in their recent report “Estimating the Exaflood: The Impact of Video and Rich Media on the Internet – A ‘zettabyte’ by 2015?,” which I discuss here.

In their column, Gilder and Swanson warn this won’t happen if politicians re-regulate network providers:

The petitions under consideration at the FCC and in the Markey net neutrality bill would set an entirely new course for U.S. broadband policy, marking every network bit and byte for inspection, regulation and possible litigation. Every price, partnership, advertisement and experimental business plan on the Net would have to look to Washington for permission. Many would be banned. Wall Street will not deploy the needed $100 billion in risk capital if Mr. Markey, digital traffic cop, insists on policing every intersection of the Internet.