1) That's a huge transformation that isn't going to happen suddenly, it'll be gradual. We will be able to rent our cars out for the day while we are at work within the next 10 years.

2) Research has been going on in to make this happen for 40+ years. DARPA has invested a significant amount of funding towards the goal of a BCI. All that's really necessary is the connection, that's the hardest part, just how to talk to the brain and make a safe connection to it. Google is working on it pretty heavily also. It'll be done, just a matter of when. Many science concepts people don't know if they are possible because of some unknown limit, but with BCIs we know it's possible, just a matter of figuring it out, which has turned out to be a difficult but certainly not impossible task.

http://en.wikipedia.org/wiki/Brain%E2%80%93computer_interfac...

3) Maybe in the short-term, but in 40-50 years there is no reason that a "Replicator" can't be created. http://en.wikipedia.org/wiki/Replicator_(Star_Trek)