Note that most people, worldwide, only have <1gbps internet access if at all.
Sigh. 1gbps is widely available, even in relatively poor countries.
And if you're making a _new_ device that should last for 5-10 years, it's just stupid to use technology that is getting obsoleted even now.
Most people still want the option to connect more than one device and the moment they talk over the local network, having more than one gigabit is better.