For those of us who love this type of programing please check out Cenneraium.com. I have been asking them for the past year when they will have an app for Roku to no avail.
Maybe if more people show they are interested in this it will happen.
I am concerned that the Metropolitan Opera may have a restriction in place with Roku not to allow another similar channel.
I have heard that this is in place with theaters that show the HD content. They are not allowed to show any other opera.