Do you need DisplayPort for 4k?

DisplayPort is one of the preferred connections for 4K resolution due to its high bandwidth capabilities. It offers the necessary bandwidth to transmit the large amount of data required for 4K content, ensuring a smooth and high-quality display. While there are other connection options available, such as HDMI, DisplayPort is often recommended for 4K monitors and displays. However, it's worth noting that the specific requirements may vary depending on the device and its capabilities.

For general-purpose use -- and a single 4K display is no longer a special case -- then it doesn't matter. You're probably better off with HDMI, in general, simply because monitors with DisplayPort (DP) in addition to HDMI tend to be more expensive.