Quote - I'm seriously hoping that chips will get more energy efficient.

It will not, released heat power is proportional to speed. Why do you think that are doing quad core cpus?
A single core 12 GHz CPU is much faster than a quad core 3 GHz CPU, but it will require a liquid nitrogen cooling system.
Some things can still be done to reduce heat production, one thing is to lower the core voltage, they are lowering it. My Pentium I 200 MHz had a 3.3V voltage, today my Athlon II has 1.4V, but it getting near the limit of silicon (0.7V) and then nothing elese could be done.
Germanium (the first transistors) is much better than silicon, only needs 0.2, but germanium is fragile, don't support temperature and is impossible to do large scale integration.
Other things can be done and are done as lowering the CPU clock when the CPU is idle, for example, when you are reading this post, your computer does nothing until you move your mouse or hit the keyboard. You can run the cpu at very low speed when the computer is doing nothing, return to full speed for some microsecond when you hit a key and then return again to low speed. In this way the heat production will be very low.
This is fine when you read and send emails, twit, send messages, hear some mp3 and your cell phone will keep very cool, but if you try to run Poser the cell phone will melt in your hands in seconds.

Stupidity also evolves!