I believe lukeschlather provided a good response, but I would like to add something more about the hardware side. It is a mistake to believe that one needs an e

I believe lukeschlather provided a good response, but I would like to add something more about the hardware side. It is a mistake to believe that one needs an entirely newly designed hardware chip to handle the WebM standard. Those hardware accelerators are not pure hardware. They are like little computers, with their own processors, and their own instruction memories, and their own software (or firmware). The processors are designed to efficiently compute the most commonly used math operations of the standard (which are usually Fourier transforms, matrix operations, etc.). The firmware causes the processor to apply the mathematical operations properly to the data to decode the video. The thing is that all of those video standards use more or less the same basic math operations, just in a different way. This means that a WebM hardware accelerator would look very similar hardware wise to a h.264 one but would have different firmware. In practice, I am sure that the hardware companies will make one hardware accelerator that can handle both h.264 and webm through different firmware programs. So you wont need much additional silicon or power to handle WebM. It might cost more, if the hardware companies decide to charge extra for WebM support, but that surcharge will not be much, because (i) they do not need to pay license fees, and (ii) there is a lot of competition in that field.