How do build the followup to the most successful smartphone in your company's history? You start by leaving a lot the same. At a glance, the Samsung Galaxy S4 ($TBA) looks much like the S3 — but look closer, and you'll notice changes like a 5-inch, 1080p Super AMOLED display, Gorilla Glass 3 for added durability, a 1.6GHz Exynos Octa 8-core processor, a larger battery, and a 13 megapixel camera. Of course, software plays a part too, with new features like Smart Scroll and Smart Pause that use eye-tracking and the accelerometer to scroll pages and pause videos automatically. Arriving Q2 2013.