Developing for iOS is really fun. I started learning 3 months back, bought an iMac and iPod touch. And since then, I am surprised everyday by everything it has to offer. Storyboard, Debugging, Submitting App. Everything is so beautifully designed.
Just one thing. The app store is really crowded, that too with quality apps. The apps which take lot of effort to make, someone else is offering for free. Unless you are developing for clients, its hard to survive.
incorrect to say £7 Billion Profits.