The document discusses three potential changes to the real estate industry: 1. The MLS (Multiple Listing Service) could become regulated as a public utility, requiring open access to listing data and setting standard rules and fees. This would reduce their monopoly power. 2. Realogy, the largest real estate brokerage, could acquire Zillow, gaining its technology capabilities and massive online audience. This would provide recruiting and referral advantages. 3. Walmart could expand into real estate brokerage, leveraging its large retail footprint, data analytics expertise, and low-cost business model to become a dominant discount broker. This would significantly increase competition in the industry.