Apple's new Thunderbolt Display is kind of like when the Power Rangers upgraded to Thunderzords from Dinozords—they're still just Zords (er, a display), but now with more Thunder-y power. Er, right.
What's that mean? Well, if you recall, Thunderbolt is the new interface that's got 10Gbps of throughput in each direction. So, you can daisy-chain a bunch of Thunderbolt displays (or other peripherals) together. Or more practically, leave a hard drive or other Thunderbolt peripheral perpetually plugged into your Thunderbolt display. Then when you connect your computer via Thunderbolt, you're all ready to go. No cable pulling and plugging and re-plugging. And all your data transfers are superfast.