Agreed. Apple needs to serioulsy focus on power in this instance, instead of pushing the limits on how small they can make things... Maybe change the form factor to a rack-mountable 3-4U? That'd be sweet.
Other than that, I'm assuming new Haswell processors will blow away all these i series processors.
Maybe we'll see 27-inch LED cinema displays similar to the new iMac displays... RETINA?!? fingers crossed.
Rack mount is an enterprise feature, Apple really doesn't seem that interested in that space.