I remember HBO Channel 550 was showing up in HD via xfinity stream on my ROKU. now channel HBO 550 is no longer in HD. HBO East is not HD. This is so frustrating because all the boxing events air on HBO before West. SlingTV, Directvnow, DISH Network, DIrectvNow, Directv all have HBO East in HD (in the seattle area) WHY WONT XFINITY MAKE ALL THE PREMIUMS IN HD?