The postcode lottery will never end, as once you get one set of upgrades done, then another divide appears e.g. the one that B4rn, Hyperoptic etc are creating by daring to offer Gbps.
The next step will be the areas that offer pure point to point fibre and can in 10 years start selling 3 Gbps and faster.
The only way a divide can be avoided is to mandate ONE infrastructure provider and every retailer is forced to buy the final mile connectivity from them.