That makes it sound like they went too small and decided that was a mistake. What really happened was Smartphones came out. Which required a certain size just to support the UI. Then Tablets came out to bridge the gap between smartphones and laptops. So people could start using them for watching YouTube/Netflix or reading e-books. Then the Phablet came out. Which was a bridge between the phone and the tablet. So you could still watch movies and stuff but still fit the thing in your pocket.