Apple's Thunderbolt Display is reportedly on short supply at third-party resellers. And that typically means one thing, an imminent refresh. Apple typically makes one product that sports an improved design, and then tries to implement its innovative design onwards. In this case, Apple's 2nd generation Thunderbolt Display will most likely adopt a similar ultra-thin design of the late 2012 iMacs with a sharper IPS display (possible higher resolution), improved speaker performance and upgraded USB 3.0 ports. With think, with our mockup below, that the new Thunderbolt Display's profile will have a unified thickness throughout instead of a tapered one. For all we know, it might even have a new, simplified name as well now that Thunderbolt isn't anything new.