Quote: This means, of course, future shoppers seeking a camera strictly oriented towards advanced users will be spending considerably more than now ($1200 K20D versus $700 K10D).
Ah yes... but the K10d was not $700 when new, and the K20D will not be $1200 forever
Until the K20D drops in price, there should still be some K10Ds around to buy even if Pentax isn't all that interested in selling them... just like there were (and are) still *Ist-series models available to buy at lower price if you didn't want a K100d. Even once all the new ones are sold, once the K20D comes out there will most likely be a few K10Ds entering the second-hand market if people want them badly enough.
As for further developments regarding firmware, understandably Pentax will focus on their new stuff for now... but if enough people own K10ds and think they need improving, keep letting Pentax know and hopefully you'll get your updates.