They do have lots of graphics/charts so it would probably still be cool to watch
If you saw the rumors about the Sapphire glass, it would stand to reason you would've seen the story about it NOT having sapphire glass, and rumors as to why:
It was reported right here on this site and many others.
Anyway, how are we to know that you're deaf and couldn't hear the keynote? WE'RE NOT PSYCHIC OMG.