<p>At first glance, you may not notice anything different about Windows Phone 8 compared to its previous version. Well, except for its obviously different Start screen, which now sports tiles of three different sizes.</p><p>But Windows Phone 8 is as much a departure from Windows Phone 7 as Windows Phone 7 was from Windows Mobile 6.5 in one important a way: it's a completely new version of Microsoft's mobile operating system that is not backwards compatible with its previous version.</p><p>This means that apps written especially for Windows Phone 8 will not work in Windows Phone 7, which of course has left many current users unhappy. Still, in the grand scheme of things, I suppose Windows Phone 7s user base is pretty insignificant compared to the hulking market share of Android and iOS.</p><p>Windows Phone 8 puts a focus on refining its distinctive style and features, and has reached a stage of maturity which may just give it a fighting chance this time round.</p><p><a href="http://www.techgoondu.com/2012/12/10/goondu-review-windows-phone-8/">Keep reading...</a></p><p>Read also:</p><p><a href="http://techland.time.com/2012/12/10/windows-its-still-the-best-name-for-windows/">Windows: It&#039;s Still the Best Name for Windows</a> (TIME)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=dEWI4ctM9rNlWdM4wRo31dgL-fz3M&ned=us">104 additional articles.</a></p>