You might be on to something here. Desktop agents that can have a fluid conversation with e.g. blind people about what they're "seeing". I'm not sure you need a special browser, though. Just wait a year!
Multiply those numbers by x1000 times and that's more like it.
It's actually the other way around, the accessible web site can be easily automated by AI.
If it would cost only $15m, why wouldn’t Microsoft develop it and add it to Azure’s CDN as a tickbox feature?
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Have you looked at the rules and standards? Last time I delft with Section 508 and WCAG 2.1 there were less then 100 rules. I think you have a point about to many standards, but I'm pretty sure most of the standards have an incredible amount of overlap. As someone who's blind I don't want to interact with my online banking website through AI because they were to lazy to insure it's accessible and would rather click a checkbox. I already deal with enough hallucinations about functions in third party libraries that don't exist, inaccurate product specifications, etc. I don't want to miss a bill payment because AI thought it knew what I wanted and sent money to the wrong place, or misread my account. I could see a place for AI conducting basic automated testing for accessibility and providing information to a human to verify but I'm not sure if such a product exists.