It was 2013 the last time that Roku launched a new flagship streaming box, and while we still adore the 3, the hardware can't avoid the ravages of time. Our friends over at Zatz Not Funny are reporting that the company is gearing up to replace it with a new high-end unit, the imaginatively-named Roku 4. As well as being the fourth in the series, the hardware expected to launch with 4K video playback as its primary selling point. The rumor began when streaming service Cinema Now accidentally launched a promotion for free HD rentals with every new Roku 4. Whoops.