@Dave Poeppelmeier brings up a good point when it comes to brokers who focus on investors. That is an area that would be very difficult for the tech companies to completely phase out. So I think like with most things technology is getting ready to replace, if you're specialized in a specific niche then you should have an advantage to stick around when the time comes, but if you only help the average consumer purchase their home then you might be in trouble. Do keep in mind though thats not the piece of the pie that the tech companies want. Last year investor purchases reached an all time high at 11% for the year, so it's still a small fraction relatively speaking.
Most agents now have become glorified hand holders. The consumer now has zillow, redfin, realtor etc at their fingertips so there's no need for an agent to look for properties for them. The ratio of agents that actually provide legitimate help and advice to the consumer, compared to the ones that just passed an exam and paid a realtor membership fee has a larger discrepancy than most people think. Those agents(which would be hundreds of thousands) will be ostracized quickly.