Able to break into small groups, use a whiteboard with the ability of users to write and annotate, screen backdrops(not a huge deal for me but some like it), ability to share screens and give control of your screen to a different user.

Most of the others you mentioned have some of this functionality but not all of it like Zoom. I am sure the next big thing will come in a matter of time but right now, Zoom covers all of these things.