We believe this would be useful also. Displaying the column would help with at-a-glance auditing to confirm correct/incorrect setting.

Here is a scenario: If I upload and publish 10 articles and I want to double check to make sure I have the visibility set correctly, I would have to set the filter to Permissions > Visible To > [segment] and go line by line to make sure all 10 articles are set with the proper visibility settings. If one is missing from the 10, I would have to pinpoint which one was not set properly, remove the filter and backtrack to figure out which article needs changed, which equates to more time weeding through articles.

If there was a column option listing "Visible To," Editors and Publishers could quickly scan articles in the Manage Articles section to make sure the visibility settings are set properly.