Office 2019 was released to general availability for Windows 10 and for macOS on September 24, 2018. Some features that had previously been restricted to Office 365 subscribers are available in this release.
Office 2019 is not updated with Windows update. Instead it has to be manually updated from within a component such as Outlook or Excel via the file menu. This will likely result in many with out of date versions of Office as many simply use the software without exploring more than needed.
Office 2019 is largely intended for government and large corporate uses with thousands of machines etc. Generally a image of Windows and Office is made so that when a user has problems they can reset their workstations from the company servers.
Office 2019 includes many of the features previously published via Office 365, along with improved inking features, LaTeX support in Word, new animation features in PowerPoint including the morph and zoom features, and new formulas and charts in Excel for data analysis.
OneNote is absent from the suite as the Universal Windows Platforms (UWP) version of OneNote bundled with Windows 10 replaces it. OneNote 2016 can be installed as an optional feature on the Office Installer if desired.
For Mac users, Focus Mode will be brought to Word, 2D maps will be brought to Excel and new Morph transitions, SVG support and 4K video exports will be coming to PowerPoint, among other features.
Despite being released in the same month, the new Office user interface in Word, Excel, PowerPoint, and Outlook is only available to Office 365 subscribers, not perpetual Office 2019 licensees.