Braille is still very useful. You need it for find the right restroom, reading labels, etc.

In my experience, I have found that people who know braille set themselves up for greater success in life. Using braille at an early age allows for significantly higher exposure to important aspects in literacy and grammar. If a child cannot read enlarged print for an extended period of time, that child needs braille. It's actually so important, that in the US we assume braille is the reading medium for any student with a visual impairment unless the vision teacher can prove they are capable of being successful in another medium.
For adults later in life, I think it is less important, but it still has it's benefits. You can complete tasks silently. It makes it much easier to review and edit text. I think braille on screen keyboards are faster than qwerty keyboards on iPhones. You don't have to rely on technology that doesn't always work.
Braille is still very important, especially for a younger population.
Check out Hadley for learning. They have classes.

Braille is important for literacy. If you only listen to audiobooks and screen readers it's very hard to learn spelling and punctuation.

Blind professionals who need to write formal emails or documents often rely on a refreshable Braille display for a similar reason - to be able to get the spelling and formatting precise.

Of course it's also useful for signs, like in an elevator, hotel, restaurant, etc.

Finally, note that as a sighted person if you just want to learn to read Braille by sight and not by touch, it's pretty easy. It's not like learning ASL which is a completely new language. It's more like learning a new alphabet plus some symbols and contractions.

You can learn the whole code in less than an hour and have the essentials memorized in a week. Of course learning to read Braille by touch takes more practice.

Braille is still used, mostly through braille displays. I am currently learning braille because I am going blind and I have honestly kind of been loving it. I love reading and languages so I just think of it as an hobby instead of a sad thing.

That’s the one. I’ve got the player now, but it takes a while to get.

One note about restoring vision: I'm sure you know this, but there are a lot of causes of blindness and while some of them may be curable I'm the near future, many others are unlikely to ever be cured. Also, anyone who was born blind and is now an adult is unlikely to ever be able to use their vision even if it was restored - there have been many studies of this.

Please keep that in mind when considering whether things like Braille will be useful in the future. Of course they will be because there will still be blind people.