It's the same as the DRM-encumbered business model: make movies and charge people to watch them. DRM doesn't make that model any more or less effective.
Why include DRM in html5 and potentially alienate open source operating systems?
Why use html5 to help sell more windows/osx copies?
Why use html5 to promote vendor lock-in?
Are copyright laws not enough protection?
It's the same as the DRM-encumbered business model: make movies and charge people to watch them. DRM doesn't make that model any more or less effective.