The 2018 MacBook Pro is a major advance in Apple laptop performance, easily the largest leap forward in a decade. Forgetting the small display (tiny compared to my favored 2017 iMac 5K), it can act as a real desktop-class machine. For some users, an excellent option would be to add a 5K external display, or two.
Do I want one? Yes. Will I buy one? No because (a) the configuration I want is hugely expensive and (b) the 2017 iMac 5K has an unbeatable display and I cannot work efficiently on a laptop display and (c) I expect a 6-core iMac 5K this fall.
See my recommended configurations below and recommended Macs wish list, and thank you for buying through those links.