We've got Destiny coming in Sept and Battlefront in development which I'm hoping will be as epic as everyone is hoping for, so I think the PS4 is relatively safe when it comes to future fps titles.
As for CoD I really couldn't care less anymore. The best thing this franchise has done in recent times is to bring this community together and up the anti for other XXX fps games other than that it's caused most of us to want to pull our hair out!
Of course it will still have it's appeal going forwards, but they seem to be losing the plot with regards to innovation and game changing ideas. How many of you still actually play CoD consistently as you used to? I haven't even had the urge to buy Ghosts and even my 10 year old says it crap (well not in those words) which speaks volumes.