"As early as 2018, solar could be economically viable to power big cities. By 2040 over half of all electricity may be generated in the same place it's used. Centralised, coal-fired power is over" The Guardian
We are seeing change happening first hand every time we install another system on someones home or a large systems on businesses. These are people who are taking control of their own power consumption and making a change for the better. New Zealand is a little bit slower in the uptake of solar PV systems, mainly because we have had no government incentives. A recent article in The Guardian noted an interesting change happening in electricity spot prices in Queensland, Australia, they dropped during the middle of the day. Co-inciding with peak production of all the Solar PV systems on individual peoples houses. Decentralisation of electricity production is making a change for the better, even for those people who don't have solar electricity systems on their roof.
To all the people who don't think solar is worthwhile this article is worth a read.