Apple just recently announced their new Mac Pro. The design is quite interesting and surprisingly small looking compared to most cases, and especially their last Mac Pro design. The case is a cylinder, packing a Xeon CPU, Dual AMD Workstation GPUs, Thunderbolt 2 with 20GBps throughput - supporting up to three 4K displays. All at 1/8 the size of the current Mac Pro!
Read more at Engadget: http://www.engadget.com/2013/06/10/apple-mac-pro-2013-redesign/
And check out the updated website on apple : http://www.apple.com/mac-pro/