Which Semiconductor Technologies will dominate Low Power MMICs and High Power MMICs?

Interested in weighing in wiht your learned opinions on this topic? I contend that deep submicron Silicon CMOS will dominate the low power sector, and GaN will dominate high power. Your thoughts?

Nanometer silicon CMOS has many advantages for low power consumption, and when it is combined with gm/Id methodology a very low power designs can be obtained, then it is a good choice for low power. On the other hand, I don't have much experience with high power.

45nm is currently used,rite??or even less?