It's probably the same amount as before. More phones and tablets haven't had a big effect on the amount of general purpose computers. There's devices today like raspberry pi and Arduino that fill the same niche as older general-purpose computers.

Your assume things are different and must be worse. This is a take old as time. Socrates complained about the youth no longer taking the studies as serious as his generation did. The world would have fallen into complete chaos if it were ever true. It's the conservative myth that things were better and can only get worse.

These kids accessing websites that tell you that a general purpose computer is needed, would have to rely on textbooks and magazines to get the same information in the past. A much bigger barrier, even identifying which ones you need.