I think they are pretty comfortable with the HD stream on UStream now anyways. Looks pretty durn good...
We've got to be very careful that we don't say tomorrow we're going to find the big eureka in space. I don't think it's going to come. Small, slow steps, and then eventually we'll cross some tipping point why in the heck weren't we doing research in space all along.
Ustream HD feed is far lower quality today. EDIT: Back to it's usual sharpness now. *phew!*
Educational documentaries from the 90's are probably not going to be in true HD