It’s not a stretch to think these types of things apply to mobile devices. But I wouldn’t expect to see the iPhone 5 braille edition any time soon. There are all kinds of third party accessibility devices available, and iOS and Google both have good accessibility interfaces. If you dig into an iPhones settings you can make the text bigger, change the contrast, and do all kinds of voice over settings for the blind. You can even give Siri an accent, haha.
Web accessibility has been around for a while, and plenty of people have adopted it so it’s not that far fetched to see it happening in the courts. Especially when a lot of businesses are moving to certain transactions that can only be completed online. Take airlines for example - where many charge you an additional fee if you are calling on the phone.