I'm incredibly skeptical of any non-invasive BCIs. EEG was around forever, and has completely failed to become useful as an interface system.

Neuralink N1 is a fully invasive BCI, with over 1000 recording channels that go down to neuron level. In practice, that's barely enough to provide a useful, reliable control interface. It's still SOTA - anything else that exists is straight up worse.

The pathway to better BCIs seems to be in more invasive interfaces with greater channel counts - not the other way around.