There has only been one Xbox exclusive I've wanted, which was Tales Of Vesperia. I've been quite satisfied with Playstation, so I'm getting a PS4 by the time FFXV comes out. Until that happens, I probably won't get one. I like the launch games, just not enough to buy a PS4 without saving up for it. It really shocked me to see that KH3 will come out for X1, but for some reason I feel that won't happen very often.
If I stumble across a large amount of money, I'll get a Wii U, but otherwise I don't plan on it.