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Summer announcement
iOS 18 is called by some insiders the most serious update to the system in its entire history. It's unclear whether this will be the case, but new data suggests that iOS 18 will at least bring a noticeable design change.
And you can roughly understand what the system will look like now, because it will look similar to VisionOS.
It is reported that iOS 18 will receive translucent elements and a new design for system applications, including Safari.
There is indirect confirmation of all this now: a translucent sidebar has appeared in tvOS 17.2. Apparently, many other elements will look something like this on iOS 18 and its variations for other devices.