The U.S. Customs and Border Enforcement folks (not to be confused with Homeland Security) are making great strides to improve the "welcome home" and "welcome to the USA" experience. And, they're doing it with your smartphone and applications.
For years we have been filling out a form as we land, and then presented it to the Immigration officer as we entered the USA.
Along came Global Entry, where we insert our passport, present our fingerprints and allow a retinal scan to be taken. For those in Global Entry, the process dramatically reduces time, and if you carry on your luggage often your out of the Customs area in minutes, not hours.
With your smartphone form, this will provide CBE officer a faster way to break down the lines. But more importantly, the advanced passenger data, plus the submitted data will ensure that all your data matches up, and if it doesn't, that will provide the officers the flags in advance to have the questions ready to help get the right facts or take the right action.
But the new use of smartphone forms has another benefit. Many airports, due to FAA rules, prohibit the use of mobile phones in the Customs and Immigration area in the USA. The fact that forms will now be filled out on the smartphone means you'll need to be using your smartphone to fill the form out and submit the form to the CBE servers. That also means you'll be able to send your SMS/Text messages, check your email and possibly even make calls. When I recently posed the question to a Customs officer he said that each airport would decide what was the rules, but to keep an eye out for the signs.
To me, this is progress. And progress, using technology, is what it's all about.