Partly right. The MS plan is actually much bigger than Brian Profitt suggests. The MSOffice 2007 SDK is fille dwith new API's, the most interesting of which are the ones connecting MSOffice to XAML and the Windows Presentation Foundation layer. The killer component though is the OOXML <> fixed/flow translator component with related API's.

fixed/flow is a new web format that is 100% proprietary. It's at the heart of the Microsoft cloud, enabling developers to easily transition between OOXML and IE browsers able to serve fixed/flow pages to devices, desktops and just about any kind re purposing publication - content management system imaginable.

If ISO approves OOXML, then they've standardized MSOffice as a legitamate Web editor - enterprise publication, content management, archive management front end. Instead of producing W3C compliant (X)HTML - CSS web pages though, the MSOffice Web editor will produce the proprietary fixed/flow format via the OOXML translation component we can now see in the SDK.

What we don't see in the MSOffice SDK is the use of W3C technologies such as (X)HTML, CSS, SVG, XForms, SMiL, XSL, XSL-FO. Instead of Mozilla XUL or Adobe Flex, we find XAML and Silverlight.

IMHO, Microsoft is making their run for the Web. Key to this run is ISO approval of OOXML. Once that happens, there will be no need for MS product compliance with W3C standards. The break will be complete. The We forever split into the Windows Web, and the Firefox - Apache Tomcat Web. And never the twain shall meet.