12 Core Mac Pros
The 12 core Mac Pros are actually holding their own in a ton of real-world performance tests. If you check out the Facebook group "We Want a new Mac Pro" that started last year, the owner of the group was given a Dell 16-core workstation to test out, a $10k+ beast, and it's not really much of a difference for a pro-user. The After Effects and Cinebench scores were nearly identical, and even the new Retina Macbook Pro was a solid contender. Plus, the Mac Pro is far cheaper.
If you need super performance, you're not going to use a Mac or a PC anyway, you'll be using big Linux boxes.
I agree with some other pros I've spoken with and the real problem was FCPX, and everyone just wants to complain about Apple now. Yes, it would be nice to have some new stuff in the Mac Pros in 2013, but it's not the pariah everyone makes it out to be.