XCode部署目标ios6 =兼容性?

I seem to be not understanding the effects of a specific deployment target in XCode (4.5) correctly. Specifically, I got an app in the app store that was previously set for deployment target 5.0, meaning on the app store page it says "requires iOS 5.0". So when I now set the deployment target to 6.0 in my next update, does that mean it'll I seem to be not understanding the effects of