Yes, there will be a Mac version of Poser 5, as well as localized versions for the European and Japanese market. SR3 is being worked on too.
Poser is our most successful product and will receive updates and fixes.

Stefan Werner, low-level employee at Egisys (in English: My words are not official statements as I am not in the position to make such. But being part of the team, I am not talking out of my behind.)