Okay, now that the thread seems to have settled a bit ...
Originally posted by Uluru
... at least to an extent that we know of right now, before all new cameras are released. Please note that it may as well be that flash specs are presented like these to suit current Pentax cameras, (legal reasons, they cannot advertise something not currently obtainable or controllable, especially if flashes become available and new cameras delayed for whatever reason). So it is not revealed in any way what flashes can do with future camera models.
I had the same thoughts Uluru, and hope (wish) this is correct.
It would be neat if Ricoh announces a new camera that has built-in RF transmitter, the same time that it is revealed that these flashes have a built-in P-TTL RF receiver all along. And at the same time, a hotshoe-mounted P-TTL RF transmitter is announced that mounts on existing Pentax cameras.
If Pentax can support communication with the O-GPS1 unit, I'd imagine it should be easy to develop an RF transceiver to proxy a wired hotshoe connection. The only reason I can think of that this would not work, is if the RF signal processing introduces too much latency or otherwise screws up the timing. Even still, timing could be addressed with a slightly modified P-TTL protocol. We already have regular P-TTL and wireless optical P-TTL, which are 2 different protocols, so why not a third.
That would give Ricoh even more control over legacy bodies, via firmware updates. For example, maybe the K-x will work the LED light, but to use the RF trigger accessory, you need to upgrade to a K-5 or later. This is just an example of course.