Apple’s final miss on the cool front has been in the streaming device market, where three recent studies, from Parks Associates, ComScore and eMarketer have Apple TV trailing significantly behind Roku, Chromecast and Amazon’s Fire TV in terms of market share.

Here again, Apple came into a market where the early competition (Roku) was not only fairly well-designed but had an avid fan base as well. And the product Apple introduced just wasn’t all that. In this case, it was well-designed and functional, but no more so than its competitors and it had far fewer channel options than Roku. 

From the article "Apple Is Losing Its Cool Factor, And That's A Problem If It Wants To Break Into TV" by Alan Wolk.