GHz won't become obsolete unless it's a completely different method of sending data besides a frequency of electrons through a chip. Even with different standards of building a CPU with say nanotech instead of the transistors we know of today, the frequency inwhich they perform instructions would still be referred to as GHz
I doubt it will even be as long as 5 years before we hit a 10GHz chip. I've seen quite a few reports of Intel wanting to hit it within 2-3 years but we'll see how that actually plays out.
DROOL at the monitor. Low power would be one awesome benefit, not to mention that you can look at it from different angles.
Only a matter of time, nanotech will be integrated into basically anything and everything
Just wait until they inject 'water' filled with nanomachines in your blood stream that hunt out and kill virus's