The internet itself was basically built on equality. Look at any of the articles and blog posts being written by the actual internet backbone providers. They've been keeping the equality stable through the years with their peering agreements.
We would basically be giving the rights to providers like Comcast to say "We've decided that Wikipedia should pay extra if they want consumers of their information to continue to receive it in a timely manner." "Oh, we're also starting up a new service called Xfinipedia that provides a similar service, but one where we moderate the content."
Call it paranoid, but this is exactly what they're intending to do with video streaming services. They want to provide on demand video streaming to their online customers, while making it more expensive for competitive services to operate. What prevents them (or other providers) from doing the same with any service?