The Android box was able to record video from the HDMI ... however none of them were suitable for streaming the video (which was the goal, remember?). [danman] was able to poke around the system ...
Streaming devices, on the other hand, are generally more powerful than the TV's processing and, if they become outdated, it's a lot cheaper to replace a stick or box than an entire screen.
For Android users, there's another truly awesome ... for buyers who don't mind paying a little extra for a premium streaming box with advanced features. They both include 4K HDR video support ...