1.) Metal Gear Solid
The Metal Gear Solid is a much loved franchise filled with the most loyal and enduring fans. It was traditionally a PS exclusive and MGS IV continues to be an exclusive for the company.
However, I do believe that it would be an exclusive that can draw gamers to switch or buy another console. I bet that long-time fans would no doubt be angry, but I think that they would follow the franchise wherever it goes. It's also worth considering how long this franchise has been going on because that can indicate how large the fanbase has grown.
I hear that MGS V has exclusive PlayStation content that will be announced tomorrow. Perhaps he'll say "Nope, it's not coming out for Xbox One! Only on PS4!"
Obviously, I am kidding.