Yes, Richardggmu, it should work fine. Mind you, the Dell monitor isn't particularly Mac friendly, don't know if that matters much. You can connect it via Displayport/ MiniDisplayPort to get the 4k resolution. Just checked out the retail price on that monitor....whew !! I don't know if your MacBook Pro 2018 will still have the same "disagreements" between it and the monitor. Apparently....it does Displayport over USB-C, HDMI or Thunderbolt using the appropriate cables/adapters. Anyways, back to the "Disagreements". I solved that with an EDID overrride for Dell Monitors on Mac, which is out there somewhere. There are other monitors that are more Mac friendly, maybe cheaper. If price was no object, I suppose you could go for a straight Thunderbolt monitor, which would get you 5k for one monitor, or 4k for two monitors.
john b