Google could - and certainly has (even with the latest Pixel C) - do much worse than RemixOS for the desktop. If they can't come up with any other way to make Android look good on the desktop, it should at least acquire RemixOS and go from there.
I'm not a fan of the whole "Android apps inside Chrome OS" idea - it seems like a very roundabout and complex way to achieve what Android already can by itself - run over a million Android apps. However, if it does make an Android Wear-like Android for PCs, I do think Google should retain all control, so it can update Android for PCs just as easily as it can do with ChromeOS (or as Microsoft can do with Windows). Google should in no way repeat the update failure of Android on smartphones.
I would rather slowly move everything to ChromeOS and abandon android. I find it ridiculous that I am running an OS from Google with a broken mobile browser. I also find it more likely that the ChromeOS model could remain secure despite the contents of the play store than the Android "we aren't quite sure what we meant to do here" model.
I'm not a fan of the whole "Android apps inside Chrome OS" idea - it seems like a very roundabout and complex way to achieve what Android already can by itself - run over a million Android apps. However, if it does make an Android Wear-like Android for PCs, I do think Google should retain all control, so it can update Android for PCs just as easily as it can do with ChromeOS (or as Microsoft can do with Windows). Google should in no way repeat the update failure of Android on smartphones.