Yes - this update was rolled out by Hubspot several weeks ago; super exciting!
Unfortunately, one of the biggest issues that was not addressed in this update is the problematic placement of the edit toolbar - meaning when you are on the company, contact, or deal overview pages (among others) and select the checkbox next to a specific record, the edit toolbar that appears at the top of the list covers the column titles entirely, making it a complete guessing game when you have similar column types (ie dates) beside one another.
The resizing column widths was a much-needed update - and is a huge improvement - but the column title visibility problem is still a major issue that needs addressing. Let’s hope it doesn’t take Hubspot another 2+ years to get this update rolled out 