Guest Commentary: There are nearly 70 million smartphones in use in the US (Quora Research), and by some estimates, tablets are set to overtake PC use. The mobile internet is burgeoning, devices and platforms are proliferating, and no businesses are more impacted by this digital revolution than those industry sectors that are inherently mobile. Architects and engineers particularly belong to that cohort of workers who can hardly be categorized as having “desk jobs.” They’re on the go when they’re on the job, often bristling with more than one mobile digital device.