NBC's hand-helds are are wireless, which means, because of the delay involved in digital TV, they have to be analog. That means standard definition rather than high definition.
Earlier this year I was watching a Fox Nascar race and they made a big deal about how their in-car cameras are now HD unless I was totally mistaken. Is wireless HD impossible?
Wireless HD is possible, as we saw from the blimp. And there is a prototype wireless HD that doesn't take longer to process. A couple of sideline cameras at the Super Bowl were said to be those. But NBC clearly (or fuzzily) doesn't have them yet.
The Fox HD cameras in stock cars are probably the first-generation HD cameras, but because the perspective from outside to inside is so different, the time lag isn't evident. A good director can hide it unless a car is sideways, then isn't (or vice versa).
And Sean O'Hair is the new Bill Britton. Frank Chirkinian hung him out to dry once at a Western Open, mid-1980s. If I remember correctly, Britton got on the 13th tee at Butler National and Chirkinian ran a crawl of every Western Open winner. It finished and Britton still hadn't pulled the trigger on the par 3.