Patent filings, we don't take so seriously. One of Japan's richest men, with the potential to call on an army of lawyers to defend what he claims is his invention, we probably ought to. Masayoshi Son, the billionaire (and philanthropic) CEO of SoftBank, has given a two-hour speech to his shareholders about his technological predictions for the next 30 years, and about halfway through he describes a familiar idea: augmented reality glasses that can understand what a person is saying and provide subtitles as a visual overlay. At one p
