What other options instead of QT do you have available?
QT is the only animation export option. You can kick out png.s, jpg.s, and tif.s as stills but you only get one image per "build" state (which you can think of as a kind of animation keyframe). This route would require a lot of animation & transition re-building in AfterEffects, which I'd like to avoid. (Animating in Keynote is a bit like building a ship in a bottle, but Apple has created a remarkable set of capabilities, given that there is no timeline or layer palette. Truth is, I only see some tweaking necessary in AfterEffects.)
If you want 1280x720 on a disk you have to make a BluRay disk.
It looks like Encore is equipped to do this with a minimum of fuss. Does anyone have any rule of thumb about current DVD vs Blue Ray market share? This product would be sold at historical societies, museums, and in the educational market. Probably not cutting edge technology users, but not altogether out of the loop. (I.e., no VHS tapes!)
Lord, I thought I was coming back to a digital wonderland. Damn.