Patch 4.12 has gone live for a month. This post discusses the influence of the Widow Mine change in TvP.
There is a trend in walling off the main ramp early in TvP, and it develops into a strategy of its own.
PartinG has been using this 4-Gate Blink Stalkers for quite some time, but the buzz only kicked off when he defeated Maru with it in the recent GSL quarterfinal. This post lays out the basics of the build and how Terran can deal with it.
TY used a very good build against Stats in the recent GSL series.