There's no way they ever would have exposed DirectX to JavaScript. It's not really admitting defeat to implement a web platform feature that customers want when you have no alternative.
They used to be pushing Silverlight as a way to do 3D rendering (which made sense, because it had the DirectX bindings from XNA and .NET is a superior platform for rendering code when compared with JavaScript) but now that Silverlight and basically every other native plugin is on the way out, there's no way they can lean on that anymore.
They used to be pushing Silverlight as a way to do 3D rendering (which made sense, because it had the DirectX bindings from XNA and .NET is a superior platform for rendering code when compared with JavaScript) but now that Silverlight and basically every other native plugin is on the way out, there's no way they can lean on that anymore.