Elon Musk and Sam Altman are at the forefront of brain-computer interface (BCI) technology, each pursuing distinct approaches. Musk's Neuralink has successfully implanted brain chips in five patients, including Noland Arbaugh, who demonstrated the technology by playing Mario Kart using only his thoughts. In contrast, Altman's Merge Labs is developing a non-invasive BCI solution. In parallel, UCLA researchers have introduced an AI co-pilot for EEG headsets, allowing a paralyzed patient to operate a robotic arm. Despite these advancements, experts caution about the ethical and privacy implications of a few companies monopolizing access to cognitive data.