Yeah, I doubt we'll see this. Like KDawg said, WP7 apps are designed to fit in those resolutions, be it 800x480 ad/or 480x800. Controls like Panorama and Pivot are for a phone UI. The layout is for a phone...the design, has a phone in mind.

Look at the Foursquare app:

I don't see this working at all on a 1920x1200 screen, both in UI and UX(usability).