Welcome to the site! I too came from a Jeep lineage before finding this site. I had a '94 YJ, '99 TJ, '03 ZJ and am now waiting on a '15 JKU that I ordered.
You'll see there is a growing amount of information on the '15 as they've begun delivering. There isn't much new, really. There are some small changes in color availability, a torx driver kit is included with some packages, but the big change is in the audio system for '15. For me, it was an equation of buying a year old model & saving some dough or not. I wound up ordering the '15 partly because of the sound system, but mostly because I wanted options that the remaining '14's didn't have.