The big thing I couldn't help noticing was how inefficient the real estate industry is. There's so much regulations and people taking a huge slice out of the consumers pocket.
Even the notion of ownership by consumers is at odds with modern times, after all, we hackers are finding it too onerous to even maintain physical servers and off-loading that to the cloud, while most people are still plopping down huge sums of money and mortgages to lay claim to small patches of land, in a clumsy procedure where we fork over almost a tenth of that large sum to people who provide little value (real estate agents, lawyers, city fees).
PG should put out a call to kill real estate like he did with hollywood. There's huge profits for hackers if we wrestle it away from the current players (bank, agent, lawyers), and a lot of good for consumers.
AirBnb's a good start, further steps might be to unify it with Uber, Shopify, SpoonRocket, Exec, and Mechanical Turk and reduce consumers experience down to a few button presses. There's a big opportunity for a company to offer complete life management in an app.