This is awesome, thanks! The biggest problem I had with even considering Linux on any of these machines is that the High DPI support is... non-existent, which just kills it for me :(
I think your information about High DPI support with Linux is outdated. I've been using a 4k screen with Ubuntu for more than a year now without any particular issue.
One of the things I feel is important is matching your external displays with the internal one, the 1440p in the T470s matches up with all of my displays at every desk I work at. This makes it pretty easy to move around and feel comfortable.
