This does effectively block the EU from going in the complete opposite direction (as in: explicitly granting ISP's the right to discriminate internet-traffic). It would mean invalidating Dutch net-neutrality law, which is politically virtually unthinkable.

This may not be a guarantee of future net-neutrality in the EU, but it is not insignificant. It for instance means that a backdoor approach like Googles deal-with-the-devil "net-neutrality" proposal (http://www.eff.org/deeplinks/2010/08/google-verizon-netneutr...) is something that is now very unlikely to happen on an EU-wide level.