The world continues to go mobile. And in the process, designers, programmers and product stakeholders continue to ask questions about the mobile landscape, from demographics to usage. We first presented a number of facts and insights in 2013. Here's an updated version with some new additions and a look back on how accurate some of the 2013 projections were. I've again included as many sources as possible so you can double check our conclusions. (measuringu.com)