Here you'll find technical resources for moving from the browser based Google Earth API plugin to CesiumJS.
Support for the Google Earth API ended on December 12, 2015, and many developers are moving to CesiumJS. CesiumJS is built on modern plugin-free tech, and is cross-platform, cross-browser, open source, and actively developed by a large community.
Below you can find resources for migrating your own app to Cesium, and read success stories from other users about their migration from the Google Earth API to Cesium.