Engadget The number of devices certified for HDR10+ support grew just a bit more, now that Chromecast with Google TV and the latest Roku devices have joined the list. While HDR10+ isn't quite as widely adopted as Dolby Vision, it's been present in select TVs for a while now. Those TVs include Panasonic's and Samsung's, which is the company behind the technology. In the announcement (PDF) spotted by FlatPanelsHD, Roku's Vice President of Retail Product Strategy revealed that the company has enabled HDR10+ on the all-new Roku Express 4K+, Roku Express 4K and Roku Ultra (2020) products. That means those products, along with Chromecast with Google TV, can now deliver HDR10+ content, so long as viewers are using apps that stream in the format.