Honestly, I see no point in this. What percentage of the population would use this?
The percentage of Bitcoin users that are blind. If this percentage was similar to
the general population, it would be moderately high.
From a practical viewpoint, this does not seem like a need to them.
Bitcoin relies on trustlessness. Blind people should not have to rely on someone else to use a secure BTC wallet effectively.
However, the article is ignoring other possible secure ways to store coins, such as paper wallets. Hardware wallets are touted as the "most secure way" to store BTC, and while they are considered very secure at the moment, there is no guarantee that this is the case.