If you’ve ever used similarly-specced Dell and Apple machines, you should know where the difference is: noise, build quality, long-term support, predictability in OS interaction.
Dollar for dollar, this MacPro is not particularly egregious, imho, once you factor in those elements. Maybe it could have done with a slightly cheaper entry-level option, but they don’t want to risk cannibalizing their laptop market. MacPro prices start exactly where MBP prices end: that’s not a coincidence, and I’m surprised pundits have not picked up on this. The real message from Apple is: “if you can get by with laptop specs, buy a laptop (because we make more money on that form-factor, due to higher numbers).“
The monitor is a different discussion altogether. Apple gets in and out of that market every few years, probably depending on whether they think there is some technological improvement available that allows them to claim “best in class” at reasonable price points.