We will have to wait on specs (and images) before a final verdict, but this camera to me seems to do a good job of bringing together some good Pentax APS-C features into one camera, as a flagship should.
Want best video from Pentax? You don't have to choose a K-01 or K-30 over a K-5II anymore.
Want good AF? I am guessing this will combine the best of K-30 action shooting plus K-5ii low light shooting plus other advancements.
Want best image quality for Pentax? This camera should have that, at least in terms of pure resolution.
The video additions appeal to me as an occasional photojournalist, the dual card slots for the aforementioned wedding photography, plus other possible uses (such as a Raw on one Jpg on the other)
Plus: dual slot memory card, headphone jack, possibly other features like improved rear screen and OVF, etc. All for less of a starting price than the K-5 or K-7. Really the only other thing I could ask for at this point is WiFi and a full frame sensor. An articulating screen would also be nice but not a deal breaker.
As for the person who is switching to EM1 that looks to be a great camera. Olympus CAF is super fast and you can't beat its performance to size ratio at the moment. Great lenses, too! The K-3 on the other hand will likely have much better tracking AF, better pure IQ, and an OVF. Get what works for you