Not just iOS. Almost all devices these days have hardware encoding/decoding for h.264. Webm and ogg just don't have that level of penetration. From strictly an

Not just iOS. Almost all devices these days have hardware encoding/decoding for h.264. Webm and ogg just don't have that level of penetration. From strictly an experience standpoint (disregarding the politics of it all), h.264 will give users a better experience pretty much across the board. All of nvidia’s kepler-class GPUs have dedicated h.264 hardware. Both Intel and AMD have GPU accelerated solutions for h.264. For ogg and webm, not so much. I think it's smart that wikipedia is discussing moving to this, as it'll make it more accessible.