False. That's what they say, but that's not what they do. When digital broadcast TV was getting standardized, content owners insisted that there be a "broadcast flag" that would prevent receivers from copying broadcast data. There was a bunch of push-back against that proposal, and it died.
And what happened? They go ahead and broadcast everything anyway. It turns out that the broadcast flag wasn't actually necessary. Without the flag, content owner business models work just as well as they did before.
Flash is going away. Silverlight is going away. The presence or absence of DRM in HTML isn't going to change that. Some people remember the frustrations of flash and silverlight and think that the W3C EME proposal will solve those problems. But those problems were solving themselves just fine! Now we get to look forward to a bunch more pain with proprietary, non-interoperable CDMs.