WP8 TellMe changes?

Does anyone know what changes have been made if any to TellMe voice controls in Windows Phone 8?

I can't seem to find differences on my Lumia 920 but I though MS had said there were going to be some like in-app voice control...I'd love to be able to use it in Xbox Music. Does anybody have a list of TellMe changes?

Also is the Data Sense app preinstalled or out yet? Can't find that one either...