Angular HTML Syntax
This extension adds tokenization for Angular-specific syntax in HTML template files.
The lack of this feature in VS Code (and lack of a good extension at the time) drove me to WebStorm for a while, but I couldn't stomach the awkward JRE-based text rendering or the extremely limited customization options, so I eventually moved back to VS Code and created this extension. (Update: another extension was published in the meantime, which may serve your needs if this one does not.) Issue reports and pull requests are welcome!
A Note on Implementation
Rather than defining "Angular HTML" as a wholly new language with these new features added on, this extension overrides/replaces the default HTML grammar that comes with VS Code.
The advantages are that your Angular template files will continue to benefit from VS Code's HTML language features (like Emmet, autocomplete and snippets), and any productivity extensions you're already using for HTML (like tag auto-closing, auto-renaming, closing tag highlighting, etc.) will continue to work with Angular template files.
Potential disadvantages are that if you don't want this extra syntax highlighting in your non-Angular HTML projects (for example, if you're using a library like Mustache or Handlebars whose syntax conflicts with Angular's), you will need to disable this extension for those projects, or selectively enable it only in your Angular workspaces.