.... The lenses line point will be very important I think.
You are, of course, correct when you mention lens availability. I believe you referring to the Pentax 35mm lens lineup; frankly, I thought the DA lens line was a one of the bad decisions. Not really any size, cost or weight savings compared to FF 35mm lenses, while limiting the sensor size to APS-C.
A quote from Bernard’s interview of Mr.Maekawa:
“We believe that many photographers who used to own our film bodies are looking for a reasonably affordable digital solution that would enable them to keep using their lenses while delivering all the values of digital bodies
There is a large number of Pentax lenses out there waiting for a digital body. Apparently Pentax’s intention is to initially produce bodies for photographers who have an exisiting supply of Pentax MF lenses. As a customer, I might prefer many new lenses, but as a business decision it makes sense- they are introducing the camera without a huge initial cost in lens design and production.
According to the interview, existing film lenses (other than wide angle) work quite well. In my own informal tests of 67 and 645 lenses on a K20D, the MF lenses are the equal of the 35mm.
I’m ready for a visit to Japan.