Streaming services would most likely move to native desktop applications, like they do with mobile apps, before abandoning DRM. Netflix already has a Windows desktop application, but they don't seem to promote it much.
https://www.microsoft.com/en-us/store/apps/netflix/9wzdncrfj...
Sure, but it still relies a binary blob, just like Flash.
> ...I am only implementing existing industry-standard DRM as required by studios. I can choose not to do so, in which case I won't get the content I need to build a viable business, and then I will go out of business, but the status quo will not have changed.
Don't forget the story of how Apple forced the music industry into abandoning DRM on their "high-value intellectual property".
Had Google, Mozilla, Apple, and Microsoft all refused to play ball, and also continued to push towards the removal of Flash and Silverlight from the web, we would likely soon be seeing either the same abandonment of DRM'd streaming video, or the abandonment of streaming video by the major studios (and subsequent void filling by smaller players).