The peak home-buying season is upon us, but buyers and sellers taking a fresh look at the market will see a much different landscape for real estate technology than they did just a year or two ago -- and it's only the beginning of the changes to come. It's an exciting time in the real estate tech business, and anything can happen. On this special episode of the GeekWire Podcast, we assess the changes so far and debate what could happen next: Could Zillow end up buying Redfin or another brokerage to bolster its new model? Will the notion of one-click homebuying ever truly take hold? How will traditional brokerages play a role in the future? And will any of these changes actually address the fundamental problem of housing affordability?