Yes, the Elementary team has been doing great work for years. Sad that it's all parallel to the efforts of the larger GNOME Desktop project. I don't know how much code gets shared between the two, but I cringe to think that Elementary is dragging along a suitcase full of patches! Some of their apps are forks, while others are written from scratch to fit their design (UI/UX/simplicity) goals. I think their decision to use what amounts to a random, third-party web browser (Midori) as the default is laughable (this day and age, would any security-conscious person NOT recommend Chrome?).
Nonetheless, bravo to the Elementary team for taking the time to even write up this blog post (which is apparently the first in a series).
Edit: replies pointed out that Epiphany is the default web browser. Point still stands that Chrome implements the most security mitigations out of ALL browsers on the market.