Software Emulator?
"...If IBM keeps the zEnterprise BC midrange mainframe at five CPs, then a single system image should be able to span up to 3,400 MIPS or so...."
Is there really a point of selling those midrange IBM Mainframes? I mean, an 8-socket Intel Nehalem-EX server gives 3.200 MIPS using software emulation with the Mainframe Emulator TurboHercules:
http://en.wikipedia.org/wiki/Hercules_%28emulator%29#Performance