Demographics and technology always steers the issue. Here in the U.S, in the PNW, we're lucky to have large amounts of hydroelectric power. While our mid-sized population is growing rapidly, technology keeps reducing our per-capita electrical needs. I toured the power generators for the Seattle area recently, up at Ross Dam. They haven't added a generator in a generation, even though Seattle is growing by leaps and bounds. Reason: electrical devices are becoming more energy efficient. Remember the hue-and-cry a few years ago about Obama taking away our God-given incandescent light bulbs? The local result of that initiative is that, while Seattle rapidly grows, her energy needs remain nearly constant. LED lights are transforming the power economy. So, when environmentalists call for carbon neutral wind farms,there is no huge pressure for them based on power needs, and when they do go in, because of carbon concerns, it is easier to put them ashore.
Down in California its a whole different deal. Big population, rapidly growing, raised on the American promise that you can have everything you want: ample power, beautiful views, bright lights and untouched environment. There are a lot of contentious voters with different agendas, so my guess it is politically expedient again to simply put the wind farms inland. That news article you posted about Cambria, California: perfect example of NIMBYism. Cambria is a wealthy, litigious enclave, whose citizens know how to ride their legislators. I think Clint Eastwood was mayor there for awhile. The citizens of Cambria--and California--are all for the environment, as long as you don't mar their horizon.
We're a country rich in resources. This embarrassment of riches is sometimes hard to look past. We have hydroelectric power, nuclear power, coal. What we don't have we can readily buy from the energy superpower called Canada. Just when it seems like we are going to make a decision about investing more in solar or wind energy sources, cheap natural gas shows up and proves irresistible as an energy source.
Lastly, the approval to put up the offshore wind farms, and much of the money, comes from the taxpayer, as administered by Congress. We have a notorious do-nothing Congress that can't agree on what side the Sun rises up in the morning,let alone the existence of global warning or ocean acidification. So while the ocean wind farms will go in eventually in a big way (probably), there is a lot slowing down the process in the U.S.