Microsoft is investing in browser accessibility with their new Edge browser. They are making the transition from MSAA to UIA, alongside enormous complementary investments in rearchitecting our DOM implementation and rewriting the browser interface from scratch. Users can see many of the improvements in action today using Narrator, which is built into Windows 10.
For example, while MSAA supports only basic UI constructs, Narrator works with UIA in Microsoft Edge to express more complex roles, states, and properties to better represent structured and interactive documents. Watch the demo above.
Read more about it here.