4k consumes (more or less significantly) more, which comes at a price - see the widely documented XPS 13.
If one prefers super-high resolution, it's totally fine, but it's not correct to depict 1080p as poor for a work machine.
https://www.notebookcheck.net/Lenovo-ThinkPad-X1-Extreme-Gen...
Check http://psref.lenovo.com/syspool/Sys/i_pdf/ThinkPad.pdf for the specs of currently-public models. Most of the models after October 2019 in the linked document are not yet public.
If current trends hold, the not-yet-released T14/T15/P15 will all have an optional screen available that's pretty good. Some of the lower-price L14/E14/AMD options will only have options for crappy screens. And, the point that's most important for Thinkpad enthusiasts, the majority of the business-lease sales that end up on eBay for $400 in 2023 will have the crappy screens and/or L and E series devices.
Still, I'm curious what the "ThinkPad Thor-TP" might be.
Believe it or not, there are still corporate legacy apps that run on DOS and looks great on 1366x768 and look like crap in 4k. In fact, Linux still look like crap in 4K today.
Not sure if it is because of the apps or wayland or the laptop, but it works for me.
However, I'm going to have to disagree strongly with your latter statement: Linux looks great in 4K. I'm running Ubuntu 19.10 to an external 4k monitor from a T430 right now (native display is a 1600x900 TN unit, which kind of sucks) and it looks great. I've had no significant aliasing or other problems.
Even Windows guests with Virtualbox scaling look good. You could easily use that to run corporate legacy apps, and probably should, knowing the stability and installation difficulties associated with legacy apps.. a .vmdk is probably much easier to version and distribute!
400 nits matte displays in other models are also excellent.