Not true.
The younger generation have as much real social interaction as ever. They just blend it/enhance it with internet and other kinds of interaction. It's just the march of technology used to enhance life. It's been going on for eons. Back in the stone age, people could only "socialize" with the neighbors in the nearby caves, because they couldn't easily physically reach those that were only say 10/20 miles away. Transport and communication technologies changed all that. Nothing new here.
Have you ever seen a text message? Do you think kids write letters? Do you think they spell properly? Understand capitalization? Punctuation? Do you think that instant gratification through the internet is teaching patience? Do you think that being anonymous fosters understanding of others? Or rude behavior because all they see is words on a screen? Technology can be helpful. But it can also destroy.