http://ricehigh.blogspot.com/2013/07/pentax-spotmatic-digital-concept.html
In fact, Sony has made it close with the A7/R and Nikon now has achieved that exactly with their new Df but unfortunately it is not a Pentax! >:-(
Like all the Pentax APS-C flagship, the FF Nikon Df is also weatherproof:
And, how much is that new