Yesterday, Oppo gave us a sneak peek at something all smartphone enthusiasts have been waiting for years — under-display selfie camera. We’ve all known phones will get there eventually, but until now, all we had seen were sliders on presentations and rumors about the technology’s development. Now that we’ve seen working examples of the tech, however, the hype train is going at full speed.

What you might have missed yesterday is that Xiaomi also released a video showing off its own under-display camera technology. The company was just a few hours behind Oppo, but not long after the initial ...