Traditional real estate agent services going out of style?

More and more, home sellers are using non-traditional real estate service companies to sell their homes, and I wonder if this says something about the future of real estate agents.

Up until several years ago, a home seller had to list their home with an agent if they wanted their property to be a part of the Multiple Listing Service (MLS). And most sellers wanted to be a part of MLS because that's how the majority of homes were advertised and sold.

But now there are discount brokers and real estate service companies that offer home sellers the opportunity to be a part of MLS at a much lower cost. Many are featuring "a la carte" pricing, so sellers can pay for exactly which services they want, but often save significant money when compared to traditional real estate agent commissions.