Mostly Caleb Williams and they have added some young talent because they have a lot of draft picks from the guys they traded away. Plus, yes, Chicago is a nice city.
On the flip side, Williams is kind of a strange guy and Chicago is where football coaches go to fail. In fact I thought it was funny that Chicago fans thought it was impressive that they flew McCarty in on a private jet since they normally bring head coach candidates in with coach tickets on regular commercial flights.