Its HTML5 DRM built into Chrome. Its actually worked for ~a month in Chrome for Linux if you just spoofed the user-agent string to Windows, absurdly. The only thing really prompting this announcement is that Netflix is no longer blocking Linux user-agents.
It only works in Chrome at the moment, as Firefox does not support the required DRM.
It only works in Chrome at the moment, as Firefox does not support the required DRM.