I have been asking this question to Ford alot with little clear answers. Through Twitter, I asked Mark Fields, Ford's President of the Americas, "Mark is there anyway to get a Fusion Hybrid or Energi with the Push to Start feature?" He answered "Many do ^MF", I asked for clarification, but it seemed he was no longer online.
I heard from a dealer that "You will be able to get the PAPS(passive access passive start) in your 2013 Titanium Fusion Hybrid", but will have to wait longer to get those, maybe at the end of the year. So I am more hopeful, but Ford should come out and just state it one way or the other.
I also have it from a Ford exec that there will be a major announcement on the Ford Energi next week (that's all I can say on that at this time).