The 2013-14 NHL season may well be remembered as an important one years from now, in part because the use of analytics, or advanced statistics, has taken a significant step forward in media coverage of the sport.
There have been plenty of people using #fancystats for several years, but this season the volume of writers has increased and the "mainstream" nature of the publications for which they work has also increased. This website in particular has begun to employ analytics on a more regular basis, and these weekly power rankings have intentionally been part of that.
The goal was to help show how these new ideas and statistics can be helpful in analyzing the sport. Just as there was in the baseball journalism community when analytics started cropping up, there has been resistance and debate about the validity of these new metrics.