Comcast Will Produce UHD HDR STB October 29, 2015 By Tom Allen Comcast has said that it is preparing an HDR-capable UltraHD STB for launch next year. The Xi6 will be ‘more advanced’ than this year’s Xi4, which was Comcast’s first UltraHD STB. Please enable JavaScript in your browser to complete this form.Multiple Choice * Comment Collaborate Email *EmailConfirm EmailName *Comment or Message *Submit