Couple of thoughts...
The box looks quite baddass, but that's what you expect from SGI.
Dual Itaniums on the desktop sounds pretty cool, but I'd like to see some real bandwidth numbers on the various subsystems to see if the engineers at SGI are earning their T-shirts. This may actually be the case.
The next thought is that if they've designed things right, and if they can run the 'same' software across the whole Prism line, then that's pretty cool. To think that up until 6.5.22 if you ordered a base install set for your Indigo and your buddy ordered a base install set for his 128 processor Origin, that you both got the same box of disks was pretty cool. And you could basically run the same software on both (barring MIPS3/MIPS4 issues).
And at that point, basic compatibility across the entire line makes the $8500 base price pretty palateable, particularly if you use the 'big' iron to run the analysis, and the desksides to build the apps and fine tune them.
And if one showed up at my door tomorrow, I'd use it