2 yes, it is
3 yes, the will
4 yes , it can
5 yes, they can
6 yes, I do
7 There is no need to have cash with you and it's more comfortable to get something (being at home) from your own place.
8 There is no need to spend your time on the way to post office. It's much faster to receive / send a letter or a picture
9 I don't think so. I guess, contemporary computers are quite safe for people's health.
10 I've tried to make pan-pals through the internet. But that didn't take long time. It's still make friends in real life.
11 Most likely, yes. I agree. Lots of daffy computer games and soap - operas definitely make people stupid and unsociable. We spend too much time in front of our screens.
12 They will be able to do everything. It will be created the artificial intelligence. It will be able as to teach people Japanese language as to do some household duties. It will be "booming" of human's development.