The law isn't approved until it's approved. The major ISPs don't want to do it. Google doesn't want to do it. There will be cries of censorship. From my understanding this is simply a suggestion at this point, the beginning of what could potentially be a new policy.
When it comes around, we'll actually see what happens. I'm told they wanted something similarly done in AU a few years ago and it got killed. After debating it, people realized it was a waste of time and $$.
That component was part of a bigger component dealing with child abuse as well. We'll see if the legal porn component of "default-on" actually survives.
Here's an article that hates on porn, saying this is all smoke & mirrors:
http://www.guardian.co.uk/commentisf...-internet-porn