I point out that Tony was in control of himself to illustrate a very important difference between J.A.R.V.I.S. and the neural lace device that Musk talks about. The lace is to be an embedded system which means something invasive. The method of communication is a push/pull system connected to your brain. If I can give you the information you want via a computer link directly to your brain, how are you supposed to know I'm giving you real information. If we're depending on the honesty of strangers on the Internet, I believe you understand quite quickly that this system is going to have to be mind-bogglingly better at digital security than any other computing device known to man in order for you to be absolutely certain no one is hacking your brain from the inside. Marketing is already so effective without invading your cranium. Imagine how much harder it would be to fight temptations that completely bypassed your neocortex.
Please, by all means, give me AI. Give me co-bots (someone swapped the r for a c and it just seems like a great distinction between the terminator and The Jetsons Rosie.). I like the idea of machine assisted living (not the lung function kind though). I love the idea that I could ask a machine to provide information to me. I don't like the idea that a machine would be in my head linking me to the Internet of all things. Not cool. Very very not cool.