Take either Mozilla or IE and extend it into a rich web application client with XHTML, XML, SVG/Flash, Java, local storage and wallet, digital identity built-in.  Normal web applications are handled in a sandbox of sort to keep them away from secure web apps.  Advertising and user tracking is supported directly under user control using page-transition periods in return for banning other forms of advertising and tracking.  IBM's Sash is nice, but it doesn't go far enough.  Local storage alone will affect e-commerce a great deal…