Android 5.0 Jelly Bean or Android 6.0 Key Lime pie to replace chrome OS?

What are your thoughts on this? I personally don't see the need for two operating systems despite the recent redesign of chrome OS. I do see a desktop like mode or a dock mode like you get on the transformer prime to be enabled full force in 5.0 or 6.0 and that mode will match the recent redesign in the link I posted above.