There are no guarantees Apple will integrate Chromecast support soon, if at all. However, the mounting volume of code suggests it could be more a matter of when than if. Also, Apple's software has become more Google-friendly as of late -- it added support for the app on Chromebooks just days ago. Apple has made clear that it (usually) wants its services to be as widely available as possible, and that means bringing them to platforms that were previously off-limits.