I believe whenever the margins get too fat there will be clever entrepeneurs come in and cut up the pie. http://www.iggyshousebeta.com/ and buyside realty look like they are making a run at it. Lots of these type of deals will go by the wayside but eventually one or two will succeed and be a destructive force for the realty industry, IMO. At iggy’s you can list your home on the MLS for free.
I’m sure those that have sales talent will always be able to make a nice living as they do in most industries but it will change with technology.