I could get it on PC, if I want, but I'm more attracted by Hawken. Anyway I'm sure Titanfall could become the favoured mecha game of many FPS fans, particularly Halo fans, but Killzone fans could like it too. This is my very personal impression according to the little I could deduce about its gameplay and game pace and style from the few trailers I saw.
Edit: BTW, despite not likely to become a big Titanfall fan, I'm very happy for the success West and Zampella will surely enjoy with this game after escaping from evil Skrotick.