Not just Apple stuff. When I first got the SHIELD, I hooked it up by wifi. I think the NVIDIA SHIELD has wireless AC, so I didn’t test the 2.4 GHz signal. Worked way better after I plugged ethernet into it. I have a long ethernet cable going to behind my TV, plugged into a switch with two smaller ethernet cables. The PS4 is wired too.
The Fire TV liked my wifi. Think it was 5 GHz. Ethernet was kind of useless on the Fire TV, not gigabit.