He means the chief scientist part. Before Demis had no influence on cloud, tpu development, day to day dev tools, etc.
replyDemis took Jeff former title. (Jeff became Chief Scientist when Brain was dissolved into deepmind)
replyI suspect the SVP/CEO leading Deepmind has a lot more sway over the rest of the company than someone with a title and no reports. :)
(Also the 20y+ of contributions and having built much of the base Google infra probably gave more influence to Jeff than the remaining title)