When you're asking me to pay more for a feature that almost nobody can take advantage of, I have a problem with it. Thankfully most people in this thread see the issue.
If we reach a place where internet speeds can exceed more than 1GBps then Ill advocate for higher speed ethernet ports on motherboards. Until then, it is a pointless addition that adds build cost to the motherboard, which gets passed onto consumers.
I'm not asking you to pay a higher price for anything, nor is the OP. The goal is that the more capable hardware becomes the new standard and costs exactly the same.
Here's a specific example of why you'd want network speeds to be faster all the time: I have a gaming PC and my wife has one too. Let's say she wants to play Warzone with me but it's not installed on her PC. We could wait for her to download it (slowest possible option by far), or I could just send the whole damn game folder directly to her PC from mine. That game is over 100 gigs - do I want to wait 45 minutes to an hour copying a folder over my LAN, or do I want to wait 10-20 minutes or even less? This is what I'm talking about.
Maybe I want to make a complete backup of my PC with all my media and important work, then send it to another machine, possibly an external drive? "Sorry, Comcast doesn't have multi-gigabit Internet in your area, so we don't make affordable hardware that can copy your local files in under 3 hours and never will" is not the right answer.
These are not hypothetical examples btw, I deal with those situations a lot because I'm in a multi-PC gaming and programming household and know how to leverage their strengths - which again, I don't believe is a rare situation at all.
I realize I'm getting pretty far off from the console-based origins of this thread, but we've been able to transfer data to/from our consoles on a local network since the PS3 - there's no reason they shouldn't get some love too, being more and more like mini-PCs these days.