Am I completely off to pronosticate a "simple" update to the K-7, the way the K20 came out after the K10? Same camera, minor enhancements, new sensor.
Pentaxians will be happy enough not to jump ship, and that's all. If Oly doesn't come out with something unexpected, Pentax is the only non-CaNikon to offer a semi-pro camera. Too small a market, also Sony doesn't seem to get on with the a700 evolution.
For the pumped up K-x I don't know. Yea, leds in the VF, what else, the sensor is still very competitive. But the market goes to the mirrorless side pretty quickly. Other than a quicker contrast detect focus ('cause sure they are working on it!), perhaps some maketing bells and whistles to keep the momentum.
In some years, there will be only higher-end DSLRs and mirrorless stuff. For those of you that don't bear EVF's, remember the rangefinder destiny.
Let them solve the glitch of the shutter, and it's done: this means no black-out in the EVF, no delay and, instantly, producing mirrorboxes will become obsolete (cause of the costs).
Well, enough speculation...