XPS, Office System applications, and Microsoft's software development APIs in general must come to the forefront of innovation by supporting large formats used for CAD enabling CAD to become 'webified' without the unneccessary spectre of crippleware and golden handcuffs imposed by a single vendor.
Free CAD file format viewers which support markup are direly needed.
Support for sheet sizes up to 36"x42" for example is critically imperative as are unique rights management applications supporting the management of our nation's industrialized information assets.
The ability to securely move documents around the globe while retaining interactivity within the documents themselves has become critically important.