Your DirecTV satellite box pulls a broadcast feed from the dish. Bitrates are higher, compression is lighter, and motion holds up better, especially on sports. The DirecTV app on Nvidia Shield delivers an internet stream, so it behaves like DirecTV Stream in practice. It does not mirror the satellite box’s picture quality. Streaming quality changes with bandwidth, device support, and how the app encodes each channel. That is why your Shield looks softer or shows more motion blur than your satellite receiver.