Reply #2: The Thing About Most of These Articles [View All]

[On the Road]

is that the authors rarely states what the cost per peak watt or kWh they would need to hit to product parity -- apparently somewhere between $3.02 and $3.82 per peak watt.

Or for what matter what the expected price of oil or coal is being used in 2015 or 2025.

That is a big decrease, and it would certainly make solar more affordable. But it has to be compared with the sources it's replacing, and the assumptions behind a cost decrease of 67-80%.