WordPress 4.5, aka ‘Coleman,’ was released April 12.
Named for jazz saxophonist Coleman Hawkins, version 4.5 of the popular content management system represents some significant editing improvements as well as several code updates.
Inline linking and formatting shortcuts will speed up your content creation while live responsive previews will allow you to ensure your site is mobile-friendly while code updates will accelerate your site with smart image resizing.
For a list of features and improvements, read the WordPress release notes.
And remember, regardless of your need for any particular new feature (or not), updating is always a good idea. Just make sure your plugins are compatible as well.