For many people, Gmail is Android's killer app. It's the best email app on any platform, and one of the biggest draws to Android. So anytime there is a change, it's pretty big news. With Ice Cream Sandwich, Gmail got a huge revamp. Every inch of the app has changed. Today we're going to find out just what is so different.

I'm sure you've read other articles on the new ICS apps, but those are just rehashing what was shown in the Hong Kong demo.

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