From what I have read the radio is less prone to interference and no more need for frequency pins because you will not be flying on a channel. That means you can show up at the field and turn on your transmitter without fear of causing problems for someone else and vice versa.

More info here:
http://www.spektrumrc.com/DSM/Technology.aspx

and RC specific details at their main site:
http://www.spektrumrc.com