Coolest thing ever! (For geeks only)

How's this for a human-computer interface! I want one. And just for starters, would you all get together and buy me an 8 foot monitor (sorry, multiplex display wall) for Christmas please.

And the Christmas present I am fully expecting (it's not even priced yet but the 72" was only $45,000 so this shouldn't be more than twice that):

But this is only a monitor - you've then got to get it transparent and touch-reactive, and add some serious processor power so let's double that price again. Still, worth it to play around with maps in such a cool way. Or is it?