Define "full blown update".
So, because iOS has not added widgets or live tiles you think it has not been updated? As an iOS developer I can tell you that it has changed significantly in the last 5 years. There much more to an OS than what you see on the lock screen or home page.
And what versions of Android do you consider "full blown updates"? Make sure you elaborate on why.
Ok let's take a look at android froyo and look at jelly bean. How much different does jelly bean look over froyo. Look at the performance of jelly bean and project jelly over froyo. That is what I am talking about. If feels like a brand new OS.
Now you are talking about being a developer right? Well those changes you are taking about are thing that consumers never see right? Sure iOS is faster and smoother then before but it does not feel fresh or new it just feels like iOS 1,2,3,4, and 5 just faster and can do a couple of new tricks. I am talking about bring up to date with look and feel. Apple can update the way their apps look, but that does not change the fact of when I get an iphone 5 it is not going to look much different than my iphone 4 running iOS 4 did.
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This is what I am talking about Apple is not setting themselves up for future success. Smartphones are much different than computer cause you change them out a lot faster, and when you get a new phone you want it to look new and different from what you had before.