In addition, Siri will be able to react to and take actions based on what is on your screen. This is said to go into beta for developers in January, with a rollout to users in iOS 18.4 in the spring.
That will likely be coming in iOS 18.3 or 18.4, due for release around March 2025 ... You can also tap a button to ask ChatGPT about what’s on screen, or another to perform a Google image ...