No Jellybean is not a must have! ICS is working great for me, was very happy with Gingerbread before that. So please stop with your generalizations regarding Androids...
What we do know is that the iphone is simply not capable of somethings that Androids have been doing for years. The advantages of IOS are all subjective and are in the eye of the beholder (besides Itunes being native; with Google Play not having near the selection).