This is strictly political agreement with very little effect in the real world. The ISPs want to be able to say "look, we're already doing everything we can to

This is strictly political agreement with very little effect in the real world. The ISPs want to be able to say "look, we're already doing everything we can to stop piracy, no additional legislation please", whereas the RIAA wants to be able to claim "look, we're already cooperating intensely with ISPs to stop piracy and it isn't working, more legislation please". So now the empty suits on both sides are happy and can report this wonderful political victory to their bosses, whilst actually having accomplished fuck all.