1. Leave things as they are, so Flash and Silverlight limp along to serve DRMed content, and native apps are required to watch on devices which don't support plugins. Verdict: Not great, but hey it's how it is now.
2. Lobby the media owners to drop DRM. Verdict: Highly improbable
3. Lobby the media distributers (Netflix etc) to boycott media owners who won't drop DRM. Verdict: Highly improbable
4. Ask end-users to boycott purchase of un-DRMed content (and no pirate it, as they will only encourage the media owners to use more DRM). Verdict: Highly improbable. Us nerds may do it, but regular folk don't really care about DRM.
5. EME is implemented as a convention, but not in the official spec. Verdict: Possible, I think EME will be implemented in IE and Chrome with or without it being in the spec. Mozilla wouldn't I presume.
Can anyone think of any others?