I agree. Humane tried with a new form factor. An audio-only interface is too limited. A watch screen is too small. There's a lot going for a decently sized screen that lets you look images, maps, emails, webpages that you control (rather than projecting onto the nearest (in)convenient surface), that fits in your pocket. Good enough BCIs are still years/decades away.

I could imagine AirPods that connect to various screens embedded in the environment, which you temporarily use when next to them. But it's still jot as convenient as a screen in your pocket.