> Images, gifs and short videos seems like a logical step forward for mass consumption.

Yup, their first order of business is to optimize for the widest swath of users. That being said, as feeds become more customized, I'm sure you'll start seeing more rich articles if that's what you desire.

Twitter delivers desirable information because the user curates it strongly (it's normal to follow/unfollow users over time), but Facebook will likely replace that effort with algorithms.