Below is a screenshot of Facebook testing new listen buttons in the news ticker alongside music apps like Spotify. Visually, its a bold move because they are all over the feed... and it turns a good percentage of Facebook into a music network (people, songs, apps, trends, etc).

It's also a bold move because it's potentially a very slippery slope... are "read" icons coming? "Shop"? etc? Visually that could create significant clutter / confusion - but it also creates hubs of verticalized activity. Fascinating to watch.

Hat tip to Andrew Machado for the screenshot. Founder of OpenHomePro and Dogpatch Labs resident

without the new listen buttons