Just like you should always be careful who you ignore in middle school, it's probably also a good idea not to disregard a new invention or discovery before it has realised its full potential. Deride the latest fad with caution, because it might just blossom into a beautiful young woman and/or change the way we all live our daily lives.
Making predictions about the future is always a risky business. Sometimes, you can hit the nail on the head and retrospectively seem like a cross between a mad scientist and a wizard. But, there's also the ever present danger that you can also end up getting a bit carried away and predicting a bright shiny future that never comes to light, or damning an emerging technology that is set to take off like nothing else before it. Either way, you end up looking like a bit of an idiot.
There have been plenty of times in the past when so-called "experts" might have been a little too quick to spurn the latest gadget, reject the latest discovery or even dismiss the latest findings as a hoax.