While we wait for the delayed stream to start, it's worth taking a peek at their job board which has some interesting bits of information in the job descriptions: https://jobs.lever.co/neuralink
For example:
> "As an Optical Engineer at Neuralink you will develop custom optics and imaging systems used directly in our surgical robot, and associated consumables manufacturing systems." [0]
EDIT: I guess the article from The Verge linked in the other comments sheds even more light on that particular bit:
> "[...] the company has developed ”a neurosurgical robot capable of inserting six threads (192 electrodes) per minute [automatically],” according to the white paper. " [1]
Similarly described in the Bloomberg article which was just released [2]