Nobody has done it fully yet, including Apple. But again, Cringely doesn't give a single reason why Apple would succeed in this space over Google or Microsoft, or something like Ubuntu. Enterprise is probably going to want to stick to mostly one OS if everything has to be ported over and all their accessories need to be compatible, and iOS is very very unlikely to be first choice of most IT departments for obvious reasons.

So the idea of convergence isn't new, and the idea that iOS would win at the convergence game in the Enterprise is implausible - I don't know what he was smoking when he wrote this article.