This is a bit of an odd build in that it seems at first sight that there's not a whole bunch that's new, but that's not really the case; this build includes lots of smaller, but equally important changes and improvements.
Having said that, the biggest change in this build is related to fonts. As of 17083, fonts can now be bought, installed and managed from the Microsoft Store. It may not sound like much of a change, but actually it will make font management a hell of a lot easier for yon average user.
Here's what Microsoft says about the font changes:
Font Settings and Fonts in the Microsoft Store
Fonts are an important asset for your visual creativity. In this build, we’re introducing new experiences for managing your fonts in Settings, and for acquiring additional fonts from the Microsoft Store.
You may be familiar with the Fonts control panel, which you could use to see the fonts that are currently installed, or to install or uninstall fonts. That control panel hasn’t been able to show off newer font capabilities, such as color fonts or variable fonts, and a refresh has been needed. In Build 17083, we’re providing a new Fonts page within Settings.
The initial page for Fonts settings provides a short preview of each font family. The previews use a variety of interesting strings that are selected to match the primary languages that each font family is designed for together with your own language settings. And if a font has multi-color capabilities built into it, then the preview will demonstrate this.
When you click on one of the family previews, it will take you to a details page that provides previews for each of the fonts within that family, along with other information about each font. There is a default preview string, but you can enter your own, custom preview string as well.
For Web developers and advanced typographers that want to make use of OpenType Variable fonts, there is a separate variable-font details page that allows you to explore the continuous, variable-design capabilities of the font.
Along with the new Settings experience, we are introducing fonts as a new content type in the Microsoft Store. To find them easily, there is a link from the Fonts page in Settings directly to the Fonts collection in the Store.
Note that you need to be running build 17040 or later to be able to install the font packages in the Store. For now, we have a small set of curated offerings from Microsoft’s library of fonts, but this will grow over time. Make sure to come back regularly to see what’s new!
We hope you’ll find the new font experiences in Settings and in the Store will enhance your own creativity. We’d love to hear your feedback via the Feedback Hub, or your reviews of the font offerings in the Store.
The full release notes are here.