The next adventure for Sam Fisher is Xbox 360 exclusive. The developers have dodged questions about a PlayStation 3 port time and time again, as the details regarding the exclusivity remain a secret. Ubisoft Montreal CEO Yannis Mallat didn't dismiss the possibility of Splinter Cell: Conviction coming to PlayStation 3 in an interview with Videogamer.com, but he didn't make it sound like it's happening anytime soon.
"There is always hope," said Mallat, discussing anxious PS3 fans. "I can't predict the future. But it's good to hear that people who can't play Splinter Cell are willing to."
"Hope" most likely means whenever the exclusivity period runs out. Unfortunately, unless Microsoft decides it wants to start talking about that (unlikely), it's probably best to just not think about it.