Windows Phone’s greatest detractor isn’t its lack of ecosystem. It’s that nobody knows why it’s worth using. Remember when Microsoft started advertising Windows Phone? The message was “You won’t obsessively love it, but don’t worry, you won’t hardly be using it anyway.” Compare that to the recent Internet Explorer videos, which directly take aim at the misconceptions surrounding the product and showcase its utility. There’s some savvy at work here, some style and personality. It’s inducing smiles in a way that none of the Windows Phone ads do, and it’s colourful and…