Sales of the iPad mini are cannibalizing sales of the iPad, according to a report from NPD DisplaySearch. January shipments of tablet panels between 7 and 9 inches eclipsed shipments of larger panels, indicating an unexpected shift in consumer preference for a smaller form factor tablet. Shipments of 9.7-inch panels (the iPad) fell from 7.4 million in December to 1.3 million in January, while shipments of 7.9-inch panels (the iPad mini) rose to over 5 million. Smaller tablet panels, including those used for the iPad mini, the Kindle Fire, and the Google Nexus, saw total shipments of 14 million. In December, NPD es