iPhone X models have a 3D-touch capable 5.8" (diagonal) OLED HDR "Super Retina" display (2436x1125, 458 ppi, 1 million:1 contrast ratio) that occupies nearly the entire front of the device with the bottom "chin" where the "Home" button once was gone entirely and replaced by a new facial recognition "Face ID" authentication system.
The iPhone X has three cameras. On the front -- tucked in the rather awkward "notch" -- is a new "TrueDepth" camera that in addition to supporting the "Face ID" functionality, takes 7 megapixel photos, shoots 1080p video, and has software support for Portrait mode, Portrait lighting, and more. The two rear cameras, one wide angle (f/1.8 aperture) and one telephoto (f/2.4 aperture), both have 12 megapixel sensors, support optical image stabilization, and shoot 4K photos and video. The cameras support motion tracking and offer augmented reality support, too.
The iPhone X is powered by a 64-bit "Apple A11 Bionic" processor with sixcores -- two performance cores and four high-efficiency cores -- and has 3 GB of RAM, as well as 64 GB or 256 GB of flash storage. It also supports 802.11ac Wi-Fi with MIMO, Bluetooth 5.0, LTE (4G), and NFC for Apple Pay.