From the blog "Featured News"

7/2 Update: In response to this announcement, we're answering questions from the community about Tilia in our forum. 7/10 Update: As mentioned in a follow-up blog post, we'll be discussing this announcement in more detail at our official Tilia Town Hall held in Second Life on Friday, July 12 at 1 p.m. (SLT/Pacific). For those who can't join us inworld, a video and transcript will be provided soon after the live event.  We’re making some important changes to Second Life that will help