This would be so helpful for long &/or complex forms where we want to "section" them since we cannot have multi-page forms. For example, we are working through the idea of making a job application app where folks would apply for our jobs. We'd need sections for personal information, job history, screening questions, upload resume, and so forth. Being able to put labels throughout the form would really help make this very user friendly.
This would also be helpful even for regular forms our staff are filling out on the back-end. We have several apps that have a "Stop and save here" field but what they see is a field name on a text box, where just having something stand out more would be so much better.