The new low-power Realtek chipsets will definitely push 10 GbE forward because the chipset won't be much more expensive to integrate and run than the 2.5Gbps packages.
It all comes down to performance per Watt, the availability of cheap switching gear, and the actual utility in an office / home environment.
For 10 Gbps, cabling can be an issue. Existing "RJ45"-style Cat 6 cables could still work, but maybe not all of them.
Higher speeds will most likely demand a switch to fiber (for anything longer than a few meters) or Twinax DAC (for inter-device connects). Since Wifi already provides higher speeds, one may be inclined to upgrade just for that (because at some point, Wireless becomes Wired, too).
That change comes with the complexity of running new cabling, fiber splicing, worrying about different connectors (SFP+, SFP28, SFP56, QSFP28, ...), incompatible transceiver certifications, vendor lock-in, etc. Not a problem in the datacenter, but try to explain this to a layman.
Lastly, without a faster pipe to the Internet, what can you do other than NAS and AI? The computers will still get faster chips but most folks won't be able to make use of the bandwidth because they're still stuck on 1Gbps Internet or less.
But that will change. Swiss Init7 has shown that 25GBps Internet at home is not only feasible but also affordable, and China seems to be adding lots of 10G, and fiber in general.
Fun times ahead.
But why is the gear progressing so very slowly? Why a 25 year gap between reasonable power 1Gbps and 10Gbps?
And while not every cat6 will do 10, it would still be worth a shot, and devices aren't using 5 instead they're using even less.
Not to mention that cat8 will happily do 40Gbps as long as you can get from your switch to your end devices in 30 meters.
Perhaps because internet speeds have been under 1gbps most places until recently and the average person doesn't care about file transfers over LAN.