This strikes me as the perfect political investment. It passes the "new one on me" test, and it passes the "green is hip" test, and it would be a constant reminder of the politicians involved (ala Boris Bikes for Londoners).
It also promises to kick start a maintenance industry and lower costs as stnadrds are formed.
Overall I would expect this one to be subsidised and persued more hungrily than any offshore projects or windfarms
In Europe and Asia, I'd expect so. In the States, fossil fuel interests have already mobilized their media campaign, pushing for new taxes to penalize local solar energy generation. They've had some victories and some losses, but as another poster mentioned, they don't have to win every battle - just enough to sow uncertainty on whether it'll be a good investment.
It also promises to kick start a maintenance industry and lower costs as stnadrds are formed.
Overall I would expect this one to be subsidised and persued more hungrily than any offshore projects or windfarms