UPDATE: Commenters rightly note that you've got to buy one of the new MB/MBPs in order to take advantage of this setup, since the mini-mini-nano-DVI ("DisplayPort") plug is proprietary (wait, no it's not; wait, yes it is) and has no adapters as yet. (How permanent a situation can that be, though?) This display and these laptops are clearly meant to be sold as a unit; either it's planned obsolescence, or it's Apple's uncompromising approach to design, in which they do what seems most ideal across the board with all new components, and screw backward-compatibility. Backward-compatibility is a mire that leads to Windows.

I'm not sure why Gruber is surprised that Apple is still selling the full lineup of regular Cinema Displays even with this new one in the picture. The Cinema Displays lack iSights/mikes, power passthru, and speakers, and instead have USB/FireWire hubs. They're also still LCD-based whereas the new one is LED. The regular Cinema Displays are clearly optimized for permanently-wired tower use, whereas the new 24" is designed around the MB/MBPs, which is a use case that demands a different enough feature set that they've finally stopped making us try to pretend it can fit comfortably into the desktop display lineup.

Also, I neglected to note that even if I got one of these setups for myself (my MBP is only two years old, so I doubt I'd need to upgrade anyway), I'd still have to plug in the Ethernet cable separately as part of the ritual. So this rig doesn't completely emulate a dock; but leaving room in the market for people who don't need a docking monitor and the compromises in port arrangement that a laptop with support for one would entail means that this is a pretty decent compromise.