Hair today, gone tomorrow
There are two possibilities here. One, we're seeing the beginning of something huge that will eventually replace both Android and Chrome OS. Or two, we're seeing Google fling yet another piece of mud at the wall to see if it sticks yet they'll get bored of it in a few years, withdraw it and send out a 'thanks for playing, bye!' message to all the people who have heavily invested in it.
Given Google's behavior of the past few years, I know which one my money's on.