It’s still very impressive. The EEG she uses only reads general thoughts: e.g. thinking about pushing a boulder. She can only really do specific actions with that: there’s no level of analog control (how much should this move), it’s just a single action (fire a fireball). The brain chip is likely much higher fidelity and therefore can read much finer signals. All the credit goes to the researchers, of course, who’ve spent the last decade researching and fine tuning this technology.