The ability to edit messages you've already sent in the Messages app is one of the new features that Apple announced during its keynote speech. Craig Federighi, Apple's software engineering senior VP, said that users will be able to unsend messages and mark threads unread to easily revisit them later, as well as cover three of the most requested features from users of the messaging service.
Since the new features allow you to move between voice and touch, you may not have as many typos to fix. While you use voice, the keyboard will stay open, and it can detect the presence of e-mail.
A button for the feature in Messages makes it easier to text back and forth while you watch, as well as a list of SharePlay-ready apps that will be put directly into FaceTime.