As reported by Elizabeth Dwoskin of the Washington Post. Silicon Valley’s next hot start-up isn’t likely to be a video chat app. Nor is it likely to be an on-demand service, like Instacart or Uber. But maybe it could be — and this isn’t a joke — a law firm. That is, at least, the ambition of Justin Kan, a serial entrepreneur who knows a thing or two about hot start-ups. The 34-year-old Kan