In all honestly, you can go back over a century and see examples of "distractions" which parents did not approve of.
In the 1800's, parents feared that their children's minds would be corrupted by books.
In the 1940's, parents feared that their children's minds would be corrupted by radio.
In the 1980's, parents feared that their children's minds would be corrupted by television.
In the 1990's, parents feared that their children's minds would be corrupted by the internet and by rap music containing explicit lyrics.
In the 2000's, parents feared that their children's minds would be corrupted by video games (to be fair, this went back a few decades as well).
After 2010, parents feared that their children's minds would be corrupted by smartphones and mobile devices.
Now, its 2016, and Pokemon Go is the latest bogeyman.
Kids will always be bored, and are increasingly overworked by helicopter parents. They will always seek escapism in whatever form is popular, and I think that this current fad is much less harmful than previous ones. I would rather kids run around finding pokemons instead of playing Minecraft.