The new look of CMS Asset Page allows the users to view asset in full screen while retaining the comment feature.

Floor Plan

Photography

Copywriting

The side panels are not entirely gone. They are just hidden and you can resurface them by clicking on the compress icon above.

The checklist can be found in the Editor section. While the QC and Client comments can be found in the QC and Client sections respectively.

This eye icon lets you hide the comments inside the asset.

The download button.

This expand icon hides/opens the side panel.

And this back icon brings you back to the job's asset tab.