This is not another anti-Internet proclamation. In the past, the Internet was banned altogether. Not anymore.
This Statement is historical for two reasons:
1.) While Internet use continues to be strongly discouraged, the Gedolei Yisrael have recognized that forbidding it completely is a Gezeira She'ein Rov HaTzibbur Yecholim La'amod Ba (the Novominsker Rebbe said this in a recent Hamodia Magazine interview). In hindsight (which is always 20-20), completely banning the Internet had an unintended effect: countless people, from the most frum circles, not only did not abide by the ban, but they had no incentive to install filters or other safeguards, because they were in violation of the ban in any event. Not anymore. Today, having Internet access, while not recommended, is permissible for those who need it, provided that an effective filter is used; without a filter, it is assur.
The Gedolim spent many hours, over a period of almost six months, working on the text of this Statement. Their goal, as I understand it, was to get the message across, but without having to spell out all the details. For example, the reason an "effective filter" is required is to ensure that a third party holds the password - otherwise, it's quite ineffective. An effective filter futher requires that the settings be strong enough to block as much inappropriate material as possible, while still allowing necessary use of the Internet.
2.) For those who must use Internet, it is now clearly required al pi Halacha to install an effective filter, with monitoring software strongly recommended as well.