Proptech is a $ 20 billion industry that’s already reshaping and upending traditional real estate as we know it. And this is just the beginning. Each Thursday, The Real Deal’s Future City newsletter breaks down the biggest news in proptech across the globe, from 3-D printer homebuilders in Long Island, to emerging tech brokerages in India, to crowdfunding property startups in San Francisco. Of course, we also cover the intrigue around firms backed by SoftBank. There are lots of them.