Upgrades to Apple Maps were announced on Monday at Apple’s Worldwide Developers Conference: see coverage from AppleInsider, Engadget and TechCrunch, as well as the video of the keynote itself (the Maps section starts at 29:47).
The changes will be coming to iOS 15, iPadOS 15, and macOS Monterey this fall. They include highly detailed city maps (for only a few cities at launch); a three-dimensional map for navigation that indicates, among other things, complex intersections; improved transit features such as bus route integration and next stop notifications; precise walking directions based on a scan of nearby buildings; and an interactive globe when zoomed out. (Note that not all of these features will be available on Intel Macs, which lack the Neural Engine in Apple’s own chips, nor on older iPhones or iPads with an A11 or earlier chip.)
The Weather app will also be getting temperature, precipitation and air quality maps (see TechCrunch coverage). And Italy and Australia were announced as the next countries to get Apple’s upgraded map layer.
Update 11 Jun: MacRumors has a roundup.