Google appears to be working on another operating system which is different from its Android flavour.
The code, which can be found in the Git repository, is dubbed hsia OS, and it may be meant for mobile phones, computers, and other devices and is completely new.
The description in the repository says “Pick + Purple == hsia (a new Operating System), and those colours do not represent either Android or Chrome OS.
Travis Geiselbrech, who worked on NewOS, BeOS, Danger, Palm’s webOS and iOS, and Brian Swetland, who also worked on BeOS and Android, are all understood to be involved in this project.
Powered by the Magenta and LK kernel. The LK kernal might mean that the OS might be used for embedded applications, but Magenta targets modern phones and modern personal computers with fast processors, non-trivial amounts of RAM with arbitrary peripherals doing open-ended computation.
Google is saying nothing for now and since hsia OS is early in development it is unlikely we will discover what Google is up to for years.