People can develop their family relationships the way they want to, but it's true too that technology has invaded one's private sphere.
The number one enemy is television, robbing people of hours of more worthy activities for entertainment and the chance to just talk to one another. Another rival villian is the computer, which perhaps has already dethroned TV by popularity. Surfing on the net has become a major past time, especially with teens, as Facebook and Second Life replace authentic relationships with "real" people. Other distractors are IPODs, MP3s and other "plug away" music devices that keep people tuned out from one another. Mobile phones stay on standby, and for some they seem to be a kind of "life support system." Specialists even talk about a new form of addiction.
The same influences over family life throw their weight over relationships in general. More than ever, people need to be wary of high tech usurpers and to work at managing their time in a responsible way.
You also spoke of "eradication of culture." I find this expression too extreme to be true, but there is a trend toward "homogenization," so to speak. Minority cultures lose their distinctiveness because of more dominant Occidental influences via mass media. Recently, for example, someone from Tel Aviv told me I would feel right at home over there since I would simply be transported from one shopping mall to another! Of course, the door swings both ways; consider the sushi and Manga invasion on the consumer market worldwide.