HBO content can be tough to get hold of. You need a subscription to HBO for he HBO GO app to matter much, and that doesn’t come without heavy caveats from the cable company. For US customers, the Play Store was a source for content, as we could readily purchase shows, starting at $2.99. Starting today, the UK Play Store will also have HBO content, with no interruption on availability.
If you can't beat them, join them, as the adage says, which is what the RCA seems to have decided to do. The RCA's upcoming Internet Music System combines the usual features you'd find in a home stereo system with Internet streaming that is slowly but surely displacing it these days.
The Google Play Movies & TV app has recently been updated. This one doesn't appear to be a big update in terms of new features, however it does bring the app in line with the new layout we have seen Google rolling out for the other Play apps. Not to mention, a few other small changes that may or may not be welcomed.