Apple stores are one of the most successful retail stores in the world. In 2009, when retail sales declined around 2%, Apple’s retail sales rose roughly 7%. According to The Mac Observer, one of their largest growing product segments is accessories...iPad owners tend to average spending $150+ on accessories. Yahoo Finance reports Apple’s in-store retail accessories sales increased 85% from 2011 to 2012. And, technology experts believe that if others want to compete they will have to partner with an accessories maker.