Apple has cut its fourth quarter 2018 revenue projection to approximately $84 billion, down 5% year on year, blaming the US-China trade war and a slowdown in the Chinese economy. In a surprise letter to investors, Tim Cook warned of changing consumer behaviors in that less people are upgrading to newer iPhone models and holding onto smartphones for longer. This is really not a great shock, considering iPhone sales have been flat for some 18 months – sugarcoating this fact in its financials by hiking the price of each new iPhone model. Roku has added subscription options to content from Showtime, Epix and Starz on The Roku Channel, its free ad-supported streaming tier, and subscriptions will be integrated into…