In Samsung's case, the screens are massive -- from 78 to 105 inches, to be precise. So think about it: If you're standing in the center of a curved screen, it will feel like the screen is enveloping you, which is good. But only one person can really be in that sweet spot, which is bad. So what do you have, then? Dozens of inches of wasted -- and expensive -- screen. (Equal blame: LG has equally large curved TVs, too.) Now, picture the LG G Flex smartphone and its six-inch display. You're the only person looking at it, so the sweet spot issues are non-issues. What's more, the bend here is actually doing more good than harm; the concave shape of the panel magnifies the reflection of your face, which helps to block annoying ambient light.