We've seen a rapid progression from conventional software bought through a license to cloud-based solutions that sell for a song -- and in theory could sell through barter at some point. I am not a big fan of zero marginal cost economics, in which prices drop to zip because buyers take into account only the cost of the marginal good and not the time, effort, and other resources that went into making it No. 1. That said, the story of economics is ever-declining prices and costs, as product innovations take on ever-larger markets.