Bingo. Microsoft and Apple support H.264 for the same reasons that Walmart supports minimum wage increases and Mattel supports extensive product testing regulations.
If you read Microsoft's blog post, Microsoft is not taking sides on this like every other player is.
All they want is not to be liable for billions in damages if WebM is found infringing on some company's patents. They're supporting it via plugins if the user installs and are ready to bundle it with the OS if Google or someone else provides indemnification. They are relatively comfortable with H.264 because most of the major players are already in the pool and the standard has been around for a while, reducing chances of patent suits.
The ball is in Google's court now. They and their supporters are all over the internet saying that WebM has been vetted for patent infringement etc. Now they need to tell us why their belief is not enough to indemnify distributors and end users.
