Northey explains that WP7 is inherently more secure, because of memory compartmentalization: "We keep applications away from the bones of the OS. When an application fires up, the OS will give it a dynamically allocated security bubble, for lack of a better word, and every app has its own one of those."
These 'security bubbles' are in contrast to both Android and iOS, in which some apps have been found to steal information from one another. Northey says that "there's no other smartphone on the market that's as secure."
When WP7 was released, it was promoted as a multimedia device for the average consumer. But Northey is optimistic about the announcement of more enterprise features in the Mango update. But will it be enough to make Windows Phone 7 competitive with iOS and Android? Given the increasing concerns about mobile security, this could convert a lot of enterprise customers. And then we'll see the average consumer follow suit, a la BlackBerry.
source: Silicon Republic via WMPoweruser