Microsoft’s new Windows Phone 7 operating system is launching with a big bang: ten handsets, eighteen operators, and a massive marketing campaign

The OS itself is positioned firmly in between iPhone and Android in terms of ease-of-use and customisability; it is as fast as the best-in-class but no faster; and its interface is bold but will not be to everybody’s taste

A lack of apps, limited distribution, and expensive handsets will likely limit sales in the short term. Longer term, being late in the game with no truly compelling unique feature will make building a major position very challenging, but not impossible