I don't think anything has changed and it definitely wouldn't make sense now. There is zero growth in mobile phones, in the US and globally overall. That isn't going to get better, it's already a stagnate, saturated market. Now would be about the worst time for Microsoft to decide to re-target that market.
Azure can be a ~$30 billion sales business eventually, probably spitting off $6b or $7b in operating income. It's a dramatically better business than messing with smartphones again (other than building apps for Android & iOS). They should just keep focused on their booming cloud business.
