The same can be said of Flash, however. The other side of that coin is that content will never be available DRM free, so I'm not sure if it's an important point

The same can be said of Flash, however. The other side of that coin is that content will never be available DRM free, so I'm not sure if it's an important point; mobile content delivery is normally achieved via apps, or in the BBC iPlayer's case, in the browser, "protected" by a client certificate.