According to Famitsu (translation by IGN), representatives of Capcom had a "big apology" for PS3 fans. "Famitsu pointed out that some people may have purchased a PS3 once Monster Hunter 3 was announced last year. This drew a big apology from the Capcom reps, who said that PS3 owners should wait for further announcements in the series."
Capcom is supposedly increasing their focus on PS3 development, but no significant projects have been announced for PS3 yet. A PS3 port of Lost Planet was recently revealed at its Gamers Day. If Capcom's asking PS3 owners to "wait" for another MH-related announcement, we have a feeling many Sony fans are going to be quite disappointed.