Aristophanes: Yeah, but the A850 is not " killer in low light, much faster than anything built today by them"
I don't know how fast the AF is, but at least when talking about FPS it's definitely slower than the K-7. I'd say, only 10fps+ would qualify as "much faster" (of course, doubled by a re-vamped AF system)
IMO, it's quite unreasonable to expect such a speed demon from Pentax. A decent quality but not so fast "FF", on the other hand... IMO, if Pentax would make this step they would try to offer image quality as the differentiator from their APS-C cameras, and not speed.
The D3S is 5200$, btw. D3X is the expensive one.
Pentax/Hoya will not accept the loss leader strategy; that's what they said, and I believe them. Unlike Sony, they can't afford to do it.
About market shares...
the FF market is small. Canon, Nikon (which btw have cheaper "FF" cameras than the D3X
) and Sony - why none of them is trying? Sony, at least, with their dreams for (photographic) world domination, could've tried this strategy. Maybe... it's not possible? Maybe it's not that easy to make a cheap "FF"?
You should also note that I'm not "anti-FF". I'm just nowhere near as "pro-FF" as you are