The best answer: It's worth getting a Surface Dock if you want to use your Surface Pro X as a PC when you're at home or in the office. Otherwise, there is really no reason to get one.
Should I get a Surface Dock?
If it's someone who likes to work on a desktop PC at home or in the office, then Surface Dock will make it a complementary device suitable for Surface Pro X. It comes with four USB 3.0 ports, a pair Mini DisplayPort slots, a Gigabit Ethernet port and an audio output port, allowing you to effectively connect your Surface Pro X to some external monitors and use it as a PC. The USB hub is also great for connecting keyboards and mice, as well as any other peripheral devices and tools you may have. It is expensive, but if the increase in productivity is worth it, opting for a Surface Dock is less expensive than buying a separate desktop PC.
The Surface Pro X is, without a doubt, one of the most exciting devices that Microsoft brings us this year. It has an incredible screen of 2880×1920 of 13 inches, the new SQ1 processor from Microsoft, and can also be configured with up to 16 GB of RAM and 512 GB of storage. In addition to this, it has LTE connectivity, two USB-C 3.2 Gen 2 ports and Windows Hello support, which is very convenient. Finally, the device is the most compact Surface Pro ever designed, weighing only 1.68 pounds and a slim and sleek profile that mobile users will love. With how well the device balances power, size and ease of use, it's easy to see why Surface Pro X is such an exciting product for Surface fans.