Should someone dare the major task of writing a new web browser, please, make it fully XML aware, so, as to be able to use it as just another component in an XM

Should someone dare the major task of writing a new web browser, please, make it fully XML aware, so, as to be able to use it as just another component in an XML pipeline, for rendering. A setting to convert all HTML to XHTML. This would allow easy XPath queries while browsing, then XPath 3.1 support, XSLT 3.0 support, XML Catalogs and XQuery in the browser would be cool as well. I am aware, that this is lots of work, but it would be nice to have something, that keeps the document centric web alive, and does not play to the rumor web, that we have become.