I found it a bit too distracting when I tried it, but the real dealbreaker was not being able to use it on ereaders.
People interested in this sort of thing should also check out Atkinson Hyperlegible, a free front by the Braille institute. While its main purpose is accessibility, I find that the very recognizable letter shapes help a bit with reading speed and comfort.
I don’t think it’s a bad idea in principle, but what got me suspicious is that I couldn’t find the resolution anywhere on their page. From the only picture of the screen I found, it looks painfully low res: