lower power per instruction is the number one advantage here. Lowering power consumption means not only lower power/cooling bills, it also means better scalabil

lower power per instruction is the number one advantage here. Lowering power consumption means not only lower power/cooling bills, it also means better scalability in frequency domain, since speed of today's x86/x64 CPUs are limited by the cooling system's capability to evacuate heat (evenly) from the chip. IOW, it means temporal restoration of the MHz race, while starting number-of-cores race.