I could see myself that multicore was an excuse to the fact that CPUs were not getting faster some years back. However, even going mult-core has physical limitations, since you still need physical space to stack all the cores onto. Suppose the CPU will no longer be a flatish rectangle but became a giant square IC! :-)
However it is done both x86 and PPC face the same limitations: They are old CPU designs with modern ideas retro fitted onto them, even PC I think. x86[64] is just a hacked up 16-bit CPU from the 80's and PPC has processor limitations of the 90's..
If computers really want to make use of multicore they will need to proper multi core CPUs. x86 and even PPC is useless at this point. Expecially x86 which has as many CPU opcode extensions as it does more cores in every redesign. Computers need a CPU that can run code on multicore where the code can run so that it's speed is multiplied. Without all the botttle necks of trying to run what is at it's basic level a 70's instuction set that gets converted inside the CPU. And there a warning for you!
Thanks to Windows which does not even acknowledge DOS anymore computer technology has been held back for years because of this stupid obsession with compatibility. Throw off the shackles! It looked like the PC was moving forward but no they are still using an old CPU design. It's like they insist on using wheels to transport the CPU where a turbo jet should be powering it! :-?
Apple showed Bill Gates you can go from PPC to x86 in under 6 months. So what's topping x86 Windows going to TNG CPU next year? What? They forgot to design it! They did but bolted x86 emulation back on? And we are back where we started... :-)
