Can somebody please tell me what is wrong with iOS? I use an iPad as my main device for pretty much everything, and I'm perfectly happy with it. Especially if ARM Macs become a reality, iOS and OS X are probably going to become the same OS, except with one optimised for touch and one for mice/trackpads.
Everybody complaining about the iPad Pro being just a bigger iPad, look back. Were you one to say that tablets and phablets were just bigger phones? I was one of those people, and I changed my view. You're probably going to be proven wrong when

release a bigger iPad, and it is well optimised.
Pro software? There's no reason why that can't come to iOS devices sooner or later.