Popular Photography review was written by a complete twit who doesn't understand a thing about what Pixel Shift is for...
Quote: , by moving its sensor in 1 pixel increments, the camera is able to simulate an anti-aliasing filter to fight moiré patterns
...and who cannot copy edit:
Quote: Launching concurrently with the K-1, Pentax has also announced two new lenses for the body, a 15-30mm f/2.8 ($1,449) and a 28–105mm f/3.5–5.6 ($499). Both lenses, for which prices are not yet available,
The interesting point they do make, though, is that this is pitched at about a thousand dollars less than the D810 to which people here are comparing it.
The kit lens is nothing to write home about on APS-C - too long at the wide end - but on full frame it should rock.