The following video is from Friday's Motley Fool Money roundtable discussion with host Chris Hill and analysts Ron Gross, James Early, and Joe Magyer. In this segment, the guys talk about Zillow (ZG 1.75%), a company that is redefining the real estate business model, and their recent lackluster earnings. Could this be another example of a tech stock with a very exciting, but untested, business model leading to an overvaluation of a company that has a strong performance -- but just can't live up to the hype?