I live in NYC, and an important technology used here not mentioned is microturbines which can be used for co-generation and even try-generation. I spoke with an engineer that converted a Columbia Univ building from #2 oil to natural gas (Columbia is converting many/all buildings to natural gas) and used a micro turbine for the electric. He claimed the cost of conversion was $500K and the savings per year is $100K.

With tri-generation you get not only heat from steam and electric but also chilled water AC.

Unfortunately, microturbines don't get the tax breaks that solar and wind power gets.

During Hurricane Sandy we had a major power shortage below 42nd st (?) in Manhattan and everything was black except the Goldman Sachs building. There is a great magazine cover of Manhattan all dark except that one tower.