They say higher audio quality of voice but I wonder if there will be that much of a difference that you can really tell or just another excuse for them to use to raise their rates at some point.
http://www.dslreports.com/shownews/Verizon-CTO-Its-Up-to-Marketing-When-VoLTE-Goes-Live-124077
http://www.dslreports.com/shownews/Verizon-CTO-Its-Up-to-Marketing-When-VoLTE-Goes-Live-124077