Apple has let developers know that this change was coming for about a year and a half now. We develop a VoIP application and have been making changes well in advance of Apple fully deprecating the older socket mechanism.
It does have the downside of giving Apple more control but Apple already has full control over whether you can publish to the App Store, how your UI should look (within reason based on guidelines), not duplicating system functionality, etc. However if this improves battery life and creates applications that are designed in a better fashion then it is positive change.