Check out this cover article from Processor Magazine, written with input from Siemon.  It gives an overview of the latest 10GBASE-T active equipment technology advancements and how they indicate a strong future for twisted pair copper cabling.  Focusing on drastically  reduced power consumption versus previous generations of 10GBASE-T PHYs, reduced deployment and maintenance costs and improved infrastructure flexibility, it is a brief and solid rundown on the current state of 10Gb/s  ethernet and structured cabling.