According to the article they’re developing it for people who’ve been paralyzed in accidents (Specifically spinal cord injuries), so that they can control either their existing limbs or prosthesis using their mind. It’s intended as a disability aid.

The Unbearable Slowness of Being: Why do we live at 10 bits/s?

Several inaccurate or erroneous conceptions and misleading propaganda about brain-computer interfaces

Most of that is scifi copium propagated by mainstream media from my understanding (its been over 7 years since I have since I was involved in academics related to BCI and at least back then from what I remember there were restrictions with our brains that made it seem impossible for sci fantasy applications like downloading/uploading your brain, uploading skills to your brain, reading your thoughts, using the internet with your mind, gaining superhuman augemented intelligence, etc (I feel like its more nanotechnology territory if done in conjunction but idk things look far less plausible and limiting when you start learning and I don’t really know anything about nanotechnology and I am out of touch with how far neuroscience and BCI has progressed by now)) and the applications are primarily treating disabilities and neurological conditions. Also BCI can also be non invasive like this keyboard input with P300 waves and there are opensource boards for that which you could buy yourself but they are expensive. Misconceptions are especially dangerous here since it is being used for something law enforcement (I remember reading recently about the Indian government using BCI for checking if someone is guilty or not, it gets rejected by their highest level of court but on lower levels it gets accepted as evidence if they consent to the tests and the expensive kits [efficacy of such a system isextremely questionable and it faced criticism but we live in a capitalist dystopia and those expensive kits are sold by some corpo])