Oddly enough, some people are posting that they'll quit Pentax if the new camera doesn't support the K-mount and others are complaining that it does have K-mount. Geez
It is ironic that Pentax is one of the last (other than the Q) into the mirrorless large sensor field, but if the mirrorless is adaptable to K-mount, they will have more immediate lens support than any other mirrorless camera out there. Not saying thats good or bad - just interesting.
We need to be patient a little bit longer because right now its just a teaser announcement. (and i'm sure not going to buy it if the designer made it look like a bathtub - i don't have many standards, just a few
)