Exactly and this technology is already being commercialised over her in Europe. The three big challenges are:
* Built low cost offshore platforms. This involves taking a lot of technology from the oil industry and coming up with designs that don't require huge foundations and can be floated into place.
* VSC - Voltage Source Conversion, this is much smaller (Thought slightly less efficient) than normal LCC HVDC schemes, this technology allows you to squeeze a HVDC scheme into an offshore platform.
* Offshore wind turbines. This technology is basically solved already.
I work in these areas of technology and there has been a massive amount of progress over the last 5 years.