Originally posted by Shingoshi Any company which refuses to produce a FF can never attain the status of professional users.
That's a rather curious viewpoint. Just because some pros want FF doesn't mean they all do. There are plenty of pros working on Canon and Nikon APS-C cameras who've never touched (or needed) their FF cameras.
By your logic, once Pentax releases the 645D, then pros will be abandoning Canon and Nikon in droves since neither company offers a sensor as large as that in the 645D.
I somehow doubt that's going to happen, because in the real world pros care about a lot more than just sensor size - and they make their decisions based on what's appropriate to the job at hand, not whether their digicam sensor is identical in size to an arbitrary (albeit popular) film size.