I'm also hoping this has good Linux support when it comes time to replace my X1 Carbon at the end of the year as based on the recently updated model I also don't hold out much hope for the future of the Thinkpad.
The new trackpads. The one of the reasons I've liked Thinkpads is the two solid mechanical buttons, plus the 3rd button in the middle. The latest model replaced those with the integrated trackpad.
The old X1 Carbon apart from the display is nearly the perfect Linux Laptop. All they had to do was upgrade the display to HiDPI and it would have been perfect.