In the long term there could potentially be a lot of benefit in restoring motor function or communication in people with catastrophic brain or spinal damage, as

In the long term there could potentially be a lot of benefit in restoring motor function or communication in people with catastrophic brain or spinal damage, as well as any number of other helpful neural surgeries. The device itself is one part of that, but developing surgical techniques is another large part of the research. However like all things, it needs to be developed ethically, the counter point of course being that some of our best medical techniques have been developed over the years in unethical ways (by modern standards).