I know pentax is trying to compete with the D800 level of SLR with their K-1, but the price is a few hundred more than the entry level nikon, canon & sony full frame cameras, and that is what they are competing with.
The entry level Canon and Nikon FF cameras do not have most of the higher end features the K-1 has. It competes pretty well with D810 and has some features the D810 lacks such as a GPS, wifi, a screen that can be moved or flipped up and possibly most importantly, in-camera 5-axis image stabilization.
Yet it has weather sealing, GPS, astrotracer, WiFi and other features that the entry level full frame offerings from Canon and Nikon don't. Sony has abandoned DSLRs in favour of mirrorless and fixed miror cameras.
