4K This refers to a game’s resolution, or how high definition it is. So while a normal Xbox plays at 1080 x 1920, your Xbox One X can play at 3840 x 2160. There are also two types of 4K – Native 4K, which is the real deal and is super high def, and checkerboard 4K which is actually a 3K resolution that is then boosted up to 4K with a scaling program. It’s still far better than what a normal console can deliver, but it’s not quite as sharp as true 4K.
HDR This stands for ‘high dynamic range’ and refers to the range of colours you can see at any one time. With HDR you can see far more detail than normal thanks to boosted colours letting you distinguish details more easily. You’ll notice it most in dark areas as the subtleties of blacks will be far easier to see.
FPS This refers to frames-persecond and how smoothly a game runs. Many games tend to run at 30fps, but the X’s power will be able to boost some to 60fps, so action will feel more fluid.
Draw Distance This determines how far into the distance you can see in a game, so for example, walking in a Skyrim forest you might be able to see a lot of trees nearby and then more will pop in as you get closer, but with a greater draw distance powered by Xbox One X you’d be able to see far more details at much longer distances at the same time. You’ll also get less of that pesky pop-in.