The Pentax K-3 III is now expected this week, according to various rumors, including one from the reliable Nokishita. Pentax Rumors indicates that firmware additions will throw in eye tracking autofocus, which would make the camera stand out among other DSLRs. Other than that, the spec sheet looks an awful lot like a camera that would have been released more than five years ago.
If it does have eye-AF, it would likely be able to provide that only when operating in a mirrorless live view mode, with the mirror up and the sensor providing a flow of images to interpret. Alternately, that could be accomplished with a DSLR’s special autofocus sensor, but the resolution would be very poor. The Canon 1D X Mark III provides eye-AF in live view mode.