...and by the way, Wheel and Jeopardy are pretty impressive in HD. I hadn't watched these shows in years and I started again, to see what they did. They've revamped everything to take advantage of the higher resolution.
Basically they don't use the wide parts of the screen for much- the same feed is used for SD with the outer edges cropped. Still, the picture quality is quite good, especially when seen over-the-air, and the sets look excellent.
Lotta wide shots on Vanna, though. It's not 1986 (when I saw Ms. White on a Boston book signing tour) and no one looks the same now as we did then.
For what its worth, I rode an elevator with Vanna White at the Las Vegas Hilton last year when they were shooting WOF there. She still looks great and you could bounce a quarter off her behind. (A little OT but had to be said.)