This is clearly a display for latest-gen mac laptop users only. As a display with inbuilt docking station it's quite nice for that purpose, although would have been a hell of a lot more versatile if it had included USB 3.0 and/or eSATA ports, but I know that's dreaming.
That said, my MacBook Pro is not latest generation (MacBookPro5,1), so it's useless to me, and useless for my Mac Mini too. Ditto for all Mac Pro users (No new Mac Pro today - very disappointed indeed). If they had just added - in addition - a minidisplayport connection, or DVI, it would have been a winner. But to spend that amount of money on a monitor that won't be useable for anything except the latest generation doesn't appeal to me. TB + DVI connections would mean it could be used with every Mac and a whole range of other devices. Of course you wouldn't have the nice docking/hub functionality with the DVI connection but that's totally acceptable.
Even as a monitor for say, the latest Mac Mini, I don't really see the point. Most people have their monitor close to them and their actual computer further away at the back of a desk or elsewhere less visible than the display. I don't see the point of having all my peripherals connected to my display with all their cables hanging out, and a "clean" Mac Mini connected to it. Makes more sense to have all the cables connected to the mini, and one cable to the monitor, at least in my book.
Like I say, I think as a display + docking station for those who only own a laptop computer it works well, but they've castrated its use for most anything else by not including multiple display port types. Or a MDP>TB adapter so it could be used on older macs too.
Thunderbolt is awesome technology, but as seen by the total lack of peripherals so far (one Promise RAID drive, a Lacie drive..... whatever...) I really fear this will go the way of the ADC connector, and I'm talking as someone who owns an ADC Cinema display.