Im currently in a cross-between deciding on which one to purchase also...
The thunderbolt has benefits in regards to its 'dock' like functionality with USB,Gigabit,Speakers,FaceTime,Firewire 800.... all of which transfers simply over the thunderbolt connection... with also support for daisy chaining...
My concern however lies with the fact it ONLY supports current 2011 Macs, which means using a PC,xbox, or anything is out of the question.... my concern is whether it will ever be an option, will thunderbolt come to PC's in the same way they are on the Mac? if so have apple locked the Thunderbolt display to only support Macs?
Which is why i am considering the cinema display instead, however i don't have the functionality of the single cable and connections such as gigabit which i need 😱