Windows Narrator, a screen-reading program
“The new and improved Narrator will read quicker and feature more languages and voices…The final product will increase the amount of content Narrator reads during web browsing.”
Magnifier
“The Magnifier is also being revamped for Windows 8 on touch-screen devices. Accessing the feature will bring up a border that determines the direction the magnifier moves, while plus and minus buttons control the magnification level.”
http://www.myce.com/news/windows-8-to-feature-assistive-tech-improvements-for-disabled-users-58811/