Have you ever wondered why TVs have a 16:9 aspect ratio? If you want to know the full story, this video does an excellent job of covering it. But that's trivia now, like it or not, 16:9 screens are the most popular option. Though that ratio gets skewed when phones have on-screen buttons. True, they do duck out of the way when you're watching a video (or even just viewing a photo), but physical buttons never get in the way of on-screen content. And they allowed makers to keep the fingerprint reader on the front (which can be a good thing or a bad thing, depending on who you ask). There's...
Source: http://www.gsmarena.com/weekly_poll_onscreen_buttons_on_wider_screens_vs_hardware_buttons-news-25262.php
