re: Defining "HD"
Quite right Robert. Even a good 35mm negative gives a pretty usable 3000x2000 images (probably scanned at 6000x4000), and a medium format negative from a Hasselblad considerably more. Much better dynamic range, color fidelity, etc than TV. That image is nice, but nothing super impressive.
There's a good reason to go back to the Moon: astronauts sending great pictures back from a state of the art digital SLR.