I think you're understating what an impact this would have. What has made the web so amazing is the low cost of reaching users allows entrepreneurs to try new things with lower risk. This has lead to high rates of innovation in the tech sector. This change would stifle innovation by increasing the barriers to entry for new web services.
Many of the companies we've grown to love today might not have been able to get started in a world without net neutrality. Your next start-up might not have access to Sprint, or AT&T or Comcast subscribers without paying those carriers.
Plus, what about all the services that every major site relies on?
Example: Stripe.com, on Alexa's rankings, is #1,331 in the US. Does that mean every site that uses Stripe is broken, even if you pay for access to the main site?
Many of the companies we've grown to love today might not have been able to get started in a world without net neutrality. Your next start-up might not have access to Sprint, or AT&T or Comcast subscribers without paying those carriers.