There have been many industry changes discussed over the last 15 years, many of which have materialized and some that have yet to materialize. Don't become complacent and believe that because it hasn't happened yet, that it will not happen. Ignore them at your peril.
If it has been discussed for years, why hasn't it happened yet?
Because the buying and selling of a home is an infrequent event for most people, there is no compelling consumer drive for technology innovation in the real estate industry. The drive instead comes from entrepreneurs who look at technology as either a way to enter into what they believe is a highly lucrative field with lots of waste to trim, or from existing brokers and agents who see the use of technology as a differentiator.