A 7" 16:9 tablet has less than half the area of a 10" 16:9 tablet. <a href="http://www.displaywars.com/7-inch-16x9-vs-10-inch-16x9" rel="nofollow">http://www.displaywars.com/7-inch-16x9-vs-10-inch-16x9</a> This is a big difference in portability and visibility.