Steven Sinofsky writing on Medium:

As many have recognized, when inventions and innovations first appear they are often (always) labeled as “toys” or “incapable” of doing “real work” or providing “real entertainment”. Of course, many new inventions don’t work out the way inventors had hoped, though quite frequently it is just a matter of timing and the coming together of a variety of circumstances. It can be said that being labeled a toy is necessary, but not sufficient, to become the next big thing.

I think the mainstream always struggles to visualise a use for a product, until it’s been clearly established and made safe. And the way to get to that point is through the concept of Play.