They're beginning the rollout in the E-series which is their budget line of Thinkpads. Not sure what your metric is, but getting better than Full HD in a Windows portable for $639 is par. (Surface Go 2, being the one exception I can recall).
I'd pay 1,5kâĴ for a machine with really good specs (USB-C charging, good build, 15", good screen, preferably an AMD processor, good/great touchpad, perfect linux support, upgradable RAM), but haven't yet found a laptop that matches these requirements. I don't care so much about light weight, as I'm looking for a semi-workstation.
The closest thing I've seen so far is (apparently, it's almost impossible to even find out the model code this is supposed to have, I think it's GA401IV-HA026T?) the Asus Zephyrus G14. There's talk about a 15" version (heck, I'd happily take 17" or more), I sure hope it won't be more expensive.
You can't get it in any of them. The same T series that gets a 1440p screen with Intel doesn't with AMD. It's still a budget line. Maybe in one more generation we can go all the way and get a 4K X1 with a Ryzen.