This seems like an excellent question. As a non-expert observer, I would say that the answer is yes. But it isn't only computers that are alienating people. There are all sorts of gadgetry that can be held in the hand and plugged into the ear that are isolating and alienating people. But television has been alienating a lot of people from society for decades. Before that, motion pictures were alienating people from society. Not all people are affected, but some are obviously seriously affected. Video games are another example, and the violent video games seem especially dangerous for certain types of young males who spend too much time alone and may develop antisocial fantasies on which they could act out. Then there are cell phones and laptops. A lot of these gadgets have good and bad features. The proper word may not be "alienation" but "dehumanization."