The World Wide Web Consortium (W3C), once the force for open standards that kept browsers from locking publishers to their proprietary capabilities, has changed its mission. Since 2013, the organization has provided a forum where today's dominant browser companies and the dominant entertainment companies can collaborate on a system to let our browsers control our behavior, rather than the other way.
This system, "Encrypted Media Extensions" (EME) uses standards-defined code to funnel video into a proprietary container called a "Content Decryption Module." For a new browser to support this new video streaming standard -- which major studios and cable operators are pushing for -- it would have to convince those entertainment companies or one of their partners to let them have a CDM, or this part of the "open" Web would not display in their new browser.
This is the opposite of every W3C standard to date: once, all you needed to do to render content sent by a server was follow the standard, not get permission. If browsers had needed permission to render a page at the launch of Mozilla, the publishers would have frozen out this new, pop-up-blocking upstart. Kiss Firefox goodbye, in other words.
It is the consistency of the WebKit document model across all WebKit browsers that makes for an interoperable Open Web future. I would not however discount the importance of Firefox and Opera embracing the WebKit document model (HTML5, CSS4, SVG/Canvas, JavaScript, DOM2). That's our guarantee that the future of the Open Web will actually be open.
Tom goes on to suggest that instead of "AJAX", developers would be better off thinking in terms of "ACHJAX": Asynchronous CSS4 - HTML5 - JavaScript and XML ..... with the focus on getting as much done in CSS4 as possible.