Note that the 14 fps in the title for the 1D X refers to the amount of still pictures (18 MP, JPEG) it can take per second. iPhone 4S's time between photos was well publicized (and impressive for a mobile phone camera) at around 0.5 s, or 2 fps.
Well, a camera that can't take the picture you want is as useless as the one sitting at home. And iPhone may be, in some cases, a camera that simply can't do what you want. It's a cellphone. Of course, you won't carry a DSLR camera with you all the time, and even that isn't enough, think about lenses, flash, tripod… but iPhone won't magically replace all that, when you actually need it.
It's a digital swiss-army knife. Right now in my pocket I have an 8mp still digital camera, an HD camcorder, the world wide web, email, instant messaging, news, social networks, books, notes, digital storage, music player, video player, gameboy, etc etc etc. You couldn't fit a single one of these into you breast pocket in the 90's - I tried, and that walkman ripped that pocket right off!
Oh snap, you mean this crazy thing makes PHONE CALLS too?!