I have a sample size of 1 that it is possible today :) Screwing around on Reddit can be boring (and yet addictive).

It's not the same kind of boring that people had 100 years ago. It fills your brain with information that has to be processed.

Yet, it is very easy for a child to be distracted from homework at any level of technology. It is called daydreaming.

I think daydreaming is qualitatively much different than outside input for the purpose of this discussion. Daydreaming allows you to process old information instead of adding new information.

Books also don't have the constant change of focus.