1. If x86 hardware is so terrible (and I have heard that the architecture really is bad many times), how come we don't have competing chips out there which are many, many times more efficient? I know ARM outperforms on the low-power front, but not in terms of perf to my knowledge. Do such chips exist?
What about IBM's Cell (the one used in PlayStation 3)? Or GPU related technologies, like nVidia CUDA?