Xiaomi's shows off smartphone with a display that curves on all sides:.

We have seen waterfall displays with extreme curves at the edges of the display plenty of times, but this is the first time a company has unveiled a display that curves on all 4 sides. Such is the new concept device from Xiaomi that has an 88- degree hyper quad-curved screen with the most extreme curves we have seen so far. The concept device has no physical buttons or ports whatsoever, but there are four rounded cutouts in the corners to minimize...