Sikuli recognizes the text on your screen. Text could be targets of click, dragDrop, or any other actions. You also can read the text into your script and do more cool things.
Scale up and re-use your Sikuli scripts with import. Build your own image libraries with the new environment variable SIKULI_IMAGE_PATH.
Sikuli knows where and how large the other applications are. Make your script faster and more reliable by limiting your Sikuli commands within the application window.