I recall learning about that here. It feels obvious to want a 80x24 or larger computer braille display, but as you say that would be prohibitively expensive. I

I recall learning about that here. It feels obvious to want a 80x24 or larger computer braille display, but as you say that would be prohibitively expensive. I do hope that research goes into a more cost effective non-mechanical bump map. In a hybrid display, this would be useful for sighted persons too. For example having tactile feedback from the screen on the car's console would let the driver keep eyes on the road. And then of course let's remember that blindness isn't just seeing darkness, plenty of blind persons have enough usable vision that a hybrid display could be quite useful for them too. I know that's all pie in the sky, but the sad fact is the best accessibility technology is built on building blocks that are useful to sighted people. The iPhone's literally life-changing VoiceOver technology is the most striking example that I'm familiar with. It's a shame Apple ditched the haptic technology on their displays.