5 Gbps networking is coming to cat5e and cat6. 10 Gbps networking has already been a thing for quite sometime over cat6a and cat7 (or SFP+).
I was saying that as an example of something I would like to have seen on the new MacBook Pro would have been 5GBase-T, and which I much prefer to be built-in then as an adapter like I currently use and have to keep carrying around. 10GBase-T is too expensive, 1GBase-T could be 5 times faster. Since not built-in and thus have to keep carrying around an adapter, hoping for a 5GBase-T adapter coming soon.