Thanx.
That new features are related to ios 12.2. or something else?
The rumors are that there will be new subscription-based news/magazine, video, and perhaps game services, which will likely require updates to the News, TV, and perhaps App Store apps in iOS, tvOS, and macOS. It's possible that there will be a 12.1.5 for these, but since Apple has been beta-testing 12.2 for weeks, that seems far more likely.
It's possible that these features are coming later, and that these OS updates will come later, too. But I highly doubt that myself - I think that these services and the OS updates are coming either today or in the coming days.
See
https://www.imore.com/apple-march-2019-event-preview for more info about today's event (which starts in about an hour and forty-five minutes as I type this.)