Digital check-ins are nothing new to air travelers. Online check-ins are showing signs of maturity, and mobile check-ins are gaining ground quickly, according to J.D. Power & Associates’ 2012 North America Airline Satisfaction Study. As of June 2012, nearly half of all check-ins for North American airlines were conducted either online or through a mobile device, with mobile increasing from 5% of all check-ins in 2011 to 11% in 2012. Read the rest at eMarketer.