The devices already exist like the Intel device and KNFB software apps featured in the first article and the devices featured in the 2nd used by the 12 year old Santiago Hernandez
http://goodereader.com/blog/electron...ist-the-blind/
http://www.pinnaclenews.com/news/con...w.asp?c=270994
a screen is good for a person not completly blind who needs to blow up content to extrem sizes.
more on the intel effort