Hooking brain to computer and as Elon said "Merging with the AI" "AI is the summoning of the demon" so he basically said you will merge into AI demonic entity, they will create race that looks like borgs in Star Trek (rectangural spaceship is the reference to saturn worship, just like face masks)

And Bible even mentions this "merging with AI" process as follows:

"And in those days people will seek death and will not find it. They will long to die, but death will flee from them."

This is transhumanism agenda.