I am taking the plunge and moving from an iPhone to an Android device. I've been waiting a long time for Android to get to the point that it was fast and responsive enough, with a big enough application warehouse, wide enough support, and a smooth enough experience, to support me. Android is maturing with a consistent, system-wide look-and-feel, almost every major service now has an Android app as the counterpart to its iOS-first experience, and has a bright future with wearables, home automation, and more.
I certainly won't be the first person to change ecosystems entirely. Several have done it before, some looking for change or claim freedom, some aiming to save money, some because someone prompted them, some think they may be conforming by going with the ever-stylish Apple. I am doing it for this reason: for me, Android is now a better platform than iOS.