Its almost here. IMO its the best by far reason to upgrade your iPhone, but you don't have to, its free

Here is a lay summary of what Apple is doing with iOS7, the direction, not the actual featureset. Interesting read

http://www.npr.org/blogs/alltechconsidered/2013/09/03/218533735/forget-folders-apples-ios-7-is-all-about-the-screen