http://wccftech.com/the-iphone-8-iphone-x-are-the-first-mainstream-smartphones-to-feature-4k-video-recording-at-60-frames-per-second/

Video recording fans will be pleased to learn that the iPhone 8, iPhone 8 Plus and iPhone X are the first mainstream smartphones to feature 4K video recording at 60 frames per second.

Apple brought 4K video recording to the iPhone lineup with the release of the iPhone 6s. Back then it was a pretty big deal given how everyone had already introduced the feature and Apple was late to the party. Now, having looked at the official technical specifications of the camera sensors on both the iPhone 8 and iPhone X, it’s safe to say that Apple is breaking a tradition and bringing to the table a world’s first (sort of) by introducing 4K video recording at 60 frames per second.