Cassette versus CD. VHS versus DVD. HDDVD versus Blu-Ray. New formats mean a new media war. The latest media war is between Flash and Silverlight. Silverlight is Microsoft’s attempt to enter the Web video plug-in world and dethrone the reigning king, Flash. Adobe’s Flash has been the web’s moving image and video display titan for some time, basically the better part of a decade. Recently the likes of Apple (see the iPhone lack of Flash support) and Microsoft have taken aim at Adobe’s thriving success.