Can't see the need for 1Gbps fibre
As noted above; there may be some people who have a genuine need for all of that bandwidth but they will be a small minority.
I got by happily for several years with ~20Mbps ADSL but when the opportunity arose to switch to FTTC/VDSL I took it. I currently get ~45 down/15 up but with myself and wife and two 'young adults' in the house there is no noticeable contention and, with a business contract, we typically get through north of 400GB/month.
Mind you none of us are 4K-dependent so I'm not saying everyone would be satisfied with this but I don't need the 70Mbs+ 'enhanced' service and 1Gbps would make no difference at all.
(Gigabit ethernet internally plus Wifi for tablets and vistors).