Pentax seem to be about to release another Mirrorless camera/system that is completely incompatibly with the one they released last year! On the up side it's K-mount so if you are an existing Pentax user this might be for you
http://www.mirrorlessrumors.com/hot-first-real-pictures-of-the-pentac-k-01-mirrorless-camera/
http://www.mirrorlessrumors.com/hot-first-real-pictures-of-the-pentac-k-01-mirrorless-camera/