Haven't used Hulu on this device, but I imagine it's the same as any other Android TV box (same as the website more or less). Amazon does not support Android TV (officially), because the want to sell you a Fire TV (Stick) instead. Otherwise you can sideload the Amazon App Store and then Amazon Prime Instant Video, but it's not ideal (no official Android TV support, it's the tablet/phone app). Netflix works perfectly, streams in 4K if you have the $11.99 plan. HBO GO isn't on Android TV yet, but HBO NOW will be next month (or later this month), I believe, I would imagine HBO GO would do the same. The Shield does support all Chromecast casting though (unlike other Android TV devices, like the Nexus Player), so you can cast HBO GO from your phone (and probably Amazon Instant Video I would imagine) to the device for now.