It would be great for multitasking and for those with an avoidance to walls of text to include a text to speech narrator natively in Confluence. 

Example MSN.com new article with the feature

If I had this option next to the the Estimated Read Time calculation, I would be more likely to engage in long form content.

It would also be helpful if the playback speed could be adjusted.

This can be extra helpful on mobile devices.