Google says the new interface will begin with Android OS, but it will eventually expand across the full Google app ecosystem, bringing a more lively vibe to Gmail, Google Photos, and more. Material 3 Expressive won't be entirely unfamiliar—it shares some basic design elements with the Material You system Google launched four years ago. Material 3 Expressive is a bolder take on the same aesthetic, featuring "springy" animations, brighter colors, and new shapes.
https://arstechnica.com/gadgets/2025/05/google-reveals-vibrant-material-3-expressive-coming-soon-to-a-pixel-near-you/