This, and the fact that you're now allowed to use the app until the update is complete, suggests that this method will be used for critical updates like bug fixes and security hole plugs.
Google revealed at its Android Dev Summit this week that developers will be able to use the new In-app Updates API to create an immediate or flexible in-app update process, which either forces or nudges a user to update an app. The API will give developers a couple options when it comes to updates. Google aims to support the new form factors in Android. Google has added widely requested features in the latest In-app Updates API.
"Last December, Google launched Files Go: an app to free up space on mobile phones, find files faster and share them with others easily and quickly-even without an internet connection", states Google's announcement."Files Go was built to solve file and storage management problems for the next generation of smartphone users in countries such as India, Brazil and Nigeria".More news: 'Chucking' controversy erupts in New Zealand-Pakistan one-dayer
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This month over 118,000 new projects using Kotlin started in Android Studio, marking a 10-fold increase on a year ago, according to Google.
The tool, very appropriately dubbed the Google Play in-app update API, gives developers the ability to display dialog boxes in unupdated Android games or apps that either encourage players to update their copy to the latest version and allow them to do so while the app is still running.
Google has also announced that in less than a year, the app has a whopping 30 million monthly users, which I am sure is earning Google some $$$. Google hasn't announced an official date that it will get wide release but said the API will be available to all developers soon.