Tasks, Planner and Teams is getting an even better integration, and soon all users will be able to create tasks directly from Teams. The feature will be available from chats and discussions in channels.
To get to the feature, users need to click the three dots on a message, and select "create task" from the list of actions.
According to the messages in the Admin Center, this should be rolling out during May.
PS: The app "Tasks by Planner and To Do" will soon be renamed to just "Tasks"