Reasons for getting the Xbox One X (from a post I made recently on another forum)
The Xbox One X is the most powerful console of this gen with the most features, the best hardware geared specifically for my 4K HDR TV and again is the console with the best version for multi-platforms not only for this generation but for previous generations(enhanced mode) as well.
With my Xbox One X, it also saved me the cost of having to buy a separate 4K HDR blu ray player(which is not available on the PS4 Pro) just to watch movies in that resolution on disc.
Other reasons for buying it(all these features are not available on the PS4 Pro)
Back compatibility - especially since I already have an extensive 360 library including exclusives from 3 generations of Xbox consoles. 500+ games listed and rising
Enhanced modes - provides the best version for exclusive and multi-platform games with either increased resolution up to 4K or performance up to 60 fps in many games. 200+ games and rising
Xbox One Controller - natively recognized not only by my console but also by my Windows 10 PC
Dolby Atmos surround sound support
Free Sync (or Variable Refresh Rate) Support - nice feature found on high end gaming PCs that will help reduce stuttering and tearing
Automatic Game Mode - to reduce input lag
Ability to play games in native 4K HDR resolution
Play Anywhere option - quite convenient for me since I am also a PC gamer allowing me to shift from one platform to another depending upon where I am located and bringing my saves and achievements with me on either platform . It also allows me to play with friends on either platform. Buy the game once and play it on both platforms allowing me to play the same game on my Windows 10 laptop, or tablet while traveling and on my big screen 4K TV when I return home
Discord app(popular with gaming PC users) integration with the Xbox social app
Cross Platform play between Xbox and PC, Nintendo Switch and other platforms in games like Fortnight, Minecraft, etc.
UI that is integrated with the Xbox/Microsoft website on my PC
Smaller form factor
The One X is also better than my PC right now on multi-platforms at least until I can upgrade my gpu
Finally aside from those mentioned above many of which were added post launch, Microsoft is dedicated to adding even more features based on feedback from their customers, including Dolby Vision and support for the upcoming 2.1 HDMI standard and has been open to lending some of their iconic characters to Nintendo for use in their games. Microsoft is also investigating the possibility of adding keyboard/mouse functionality to the Xbox One console in the future.