Comment Re:Indefinitely (Score 3, Insightful) 575
We do not have calculators embedded because the procedure is high-risk and the benefit is pretty darn minor. Computers are very very good at complex math but still only a few people have the necessary brainpower to really understand mathemathical theories in order to do real work with, say, surface integrals or PDEs.
You should look at work being done with deaf and/or blind people to see real bleeding edge of wetware implants. Hearing implants are apparently already pretty good. They went from "hear something" to "hear people talk but bit wonky" in a decade or so.
The obvious huge difference here is that the implants are connected to I/O already present in the brain wetware and it's still extremely difficult to pull off.
Your calculator example would require completely artificial interface layer to the brain, which I do not see happening in a hurry. I do not think really getting brain wired is going to happen before we get a lot better in nanotech and biology and assume we do not get assimilated by gray goo.
Subvocalizing would be relatively straightforward to do, thought. You could have conversation with your implants hooked to your auditory nerve.