I couldn't read the full article, but the Mobile Passport app has improved my traveling experience through passport control. On a recent trip from Europe to SFO, the regular line for US citizens was really long, the Global Entry kiosks were full, but there was no one in the Mobile Pass line. We went through passport control in under 3 minutes.
the first rule of the mobile passport app is don't talk about mobile passport!! it is great, generally the same experience as global entry. and I'm worried that if more people use it, it will become as busy as everything else.