Note that the buttons can cascade, as when the user selects ‘due date’ and then various options for the due date are presented. Also note that ‘attach conversation’ will attach a link to the Trello card pointing back to the chat context where the task was created.
This is a serious advance for Slack integration, and specifically, the cognitive dissonance problem with a /slash command-style integration like the one with Trello. I wrote about this recently in Slack ‘Spots’, not just Bots, where I suggested that Slack was probably working on something like this. And yes, they were.