That was an option last season too, but I think I had to have a unique, partnered, non-computer device on which to register the HBO Now account, and the process was broken on the one "acceptable" device I had. I don't remember what it was, but I do remember digging it out of storage and being terribly inconvenienced.

In any case, after two thorough, time-consuming attempts I gave up and mooched of a friend who had recently bought a Roku or something.