I don't think you're right. What killed FxOS was not a lack of wrapper to run Android apps (we actually got one that worked).
What makes or break a Mobile OS is the availability of the key apps for the market you're going after: whatsapp, FB, Twitter, etc. (that varies based on the region).
I don't think you ever saw the one I'm talking about. It was done in collaboration with a partner and was never released. Also, lawyers were involved ;)
What makes or break a Mobile OS is the availability of the key apps for the market you're going after: whatsapp, FB, Twitter, etc. (that varies based on the region).