Actually the K-7 and other Pentax DSLR's can be said to have 9 simple cross and one center double cross sensor, plus two outer linear sensors. So just don't assume that the Samsung has a different AF system.
Sounds very much like sort of misinterpretation.
Please let me explain.
On Pentax DSLR's, only the middle sensor is a real cross. A +
Now, the others are called cross but they are not really cross, but they are dual sensitive sensors but not shaped like cross. So they are of a simpler design that the center sensor which is a true cross.
The 4 outer sensors are L-shaped, and the 4 in-between hare T-shaped. Yes, shaped like L and T. As you can see, L and T covers both vertical and horisontal lines, without being a +.
L and T can very well be called "simple cross" because they actually are, or at least they are dual sensitive. And the center can be called "double cross" because the lines are crossing each other, and two lines crossing = double.
The lines in L and T are not crossing, they are just connecting on one single or simple height.
Nothing in the rumour says a center sensor with f/2.8 - f/5.6 sensitivity.
So, if you replace the number 10 in the specification with a 9 - you get a working description of the AF in the K-7!
Oh dear oh dear.
It is like a baloon, raising up high and then POFF!
Sorry about that folks, I understand it was nice for you to dream a bit haha.
As for "ultra clear screen" - well Pentax calls it the Natural Bright Matte.
Of course Samsung wants their own names for Pentax-things.
Samsung calls Pentax SR for Samsung OIS. Same thing, but a different name.
OIS = Optical image stabilisation. Not even a correct name, because it is sensor shift and not done through optics!