The new Commitments capability replaced Key Results To-Dos.
All your previous To-Dos in Key Results have been transformed and supercharged into Commitments.
The text in the To-Do is the title of the Commitment.
The owner of the Key Result is the creator and owner of the Commitment.
You can go and change owners, add more details to the description, setup due date and status. And add and inform your contributors as well.
Enjoy using Commitments!