Google is dropping support for their original very basic Chrome OS in favor of a heavily Android-leaning OS version, I believe, but the main thing is that Simcity will have no further patches. Maxis was closed down following the release of three unprofitable products in a row, and there is no plan to hand off this franchise to another developer, as was done with Maxis' popular "The Sims" series.
http://www.computerworld.com/article/2925154/chrome-os/android-chrome-os-future.html
