This could be the shortest-lived phone lineup since Kin

As expected, Nokia this weekend announced a new, entry-level smart phone lineup called the Nokia X, which will sit logically somewhere between the firm's Windows Phone-powered Lumia phones and its Asha Series-40 devices. But it's not hard to wonder whether these phones are already doomed: Microsoft is buying Nokia's handset business, after all, and Microsoft already has a full-featured smart phone OS that runs well on low-end devices.