At the moment they are nowhere close to being ready for wide deployment or large scale commercial drawing (try to find some videos of modern fibre drawing the speed is absolutely insane).
Obviously the HFT crowd are very interested in these, but they are willing to pay the premiums. Also the next area is probably datacentres where latency is very important as well, and these fibres already provide similar losses to multi-mode fibres at ~900 nm wavelengths.
Assuming these cables cost more, or require equipment that costs more, I wouldn't expect this on last mile connections. ISPs simply don't care that much. DSL providers typically run connections with settings that add 15+ms of round trip. My DSL provider runs PPPoE for fiber connections where fiber is available, etc. When I was on AT&T fiber, it was still about 3-5 ms round trip to the first hop. It's been a while since I've experienced cable to know how they mess it up.
If there's significant deployment of the cable in long distance networks, eventually that should trickle down to users. It would probably happen faster if there were competitive local networks, but regardless, a significant drop in latency across a country or ocean can be big enough to justify some expense.
Do you know if anyone's considering these for consumer Internet?