Perhaps building an app that synchronizes conference slides to a phone and allows users to customize the contrast/appearance of the slides would help in this case?
I love that idea. It would let people requiring different contrasts etc see the content too.
It won't help with pictures as easily, though a few apps these days do full PDF renders in different colours without much hassle.
I am definitely in the no black background white text camp and on the web I have a javascript bookmarklet to zap the colour CSS and make everything rather plain looking. It's not all text for me, but particularly dense text is unreadable, even with my glasses on.
Let me see if I can rally some folks on the Office team to build a PowerPoint companion app that does this. I think they have a hackathon coming up ...
I wanted to experiment with VLC broadcasting over wifi for my workshops. It could reduce dependance on projectors, I encounter 1024x768 ones, as an Indian.
It won't help with pictures as easily, though a few apps these days do full PDF renders in different colours without much hassle.
I am definitely in the no black background white text camp and on the web I have a javascript bookmarklet to zap the colour CSS and make everything rather plain looking. It's not all text for me, but particularly dense text is unreadable, even with my glasses on.