I agree that gigabit Ethernet is adequate for the type of product this is. But I do find it funny that the Wifi chip on this is very likely capable of 2Gbit. We somehow entered a world where WiFi is typically faster than Ethernet.
Most people can't or wont retrofit their homes with wired networking. Those that did in the last couple decades likely used cat5/e.
The demand in the consumer space definitely favours advances in wifi.
Wi-Fi for gaming is usually plenty fine though, especially if you're not in a very dense area.
It almost seems silly to even include a wired port when the wifi chip is faster.
Most data center networking is 10s of gigabits on the lower end. People are throwing out 10/40gb hardware at this point. There just isnt any pressure in the consumer space. Most people don't even have 1gb internet connection and that is where they access most of their data.