Lynx is a text-mode browser, not a screen reader; it's still visual. Assistive tech has a whole lot more going on. They have a slew of navigation modes and need cues from content to prevent the user from getting lost, you can't just scroll or look back up to where you where. I recommend looking at the resources below, and trying to use an iPhone or mac with voiceover and screen curtain enabled to really experience what it is like.
http://alistairduggin.co.uk/blog/screenreader-resources/ (collection of videos & articles)
http://www.youtube.com/watch?v=izrC4R7SsH4
http://www.youtube.com/watch?v=S4QBqpU1jj8
http://www.youtube.com/watch?v=AmUPhEVWu_E
http://www.youtube.com/watch?v=vK1tlLOavvM (linked by PavlovsCat below)