Roku will debut a new range of high-end Smart TVs in the coming weeks, dubbed Roku Pro Series. The custom-designed flatscreens look set to be a significant step-up from previous hardware efforts by the company, which is the most popular TV streaming software in the United States. The Roku Pro Series will arrive with a thinner design than models in the Roku Select and Plus Series range. The screen will boast a 4K Ultra HD resolution, coupled with a QLED panel with mini-LED local dimming. “Wide cinematic sound” is also promised for the Pro Series. Expect to find a new “premium” Roku remote in th…