The early Macintosh and Windows were dominated by pixelated, simple windows, looking very simple but lacking in aesthetics. This gradually evolved into skeuomorphism, which seemed to incorporate real-world objects into the UI, a significant advancement. Today’s interfaces feature high-resolution interfaces and animations, resulting in a flatter, simpler look.
In terms of interaction methods, early user interfaces could only be controlled with a mouse and keyboard. Today, user interfaces can be controlled using touch, gestures, and eye tracking, making them more user-friendly and convenient. Apple Vision Pro is a good example, incorporating nearly every human interaction method, making it incredibly easy to use and efficient.