Solar - Where are the cost estimates?

So the Congress approved Solar tax credits along with California. Germany, Japan, and Spain already have them. China is going gangbusters on getting more solar capacity.

So what is this going to do to demand and supply?

How is this going to affect pricing?

What is going on with the raw material needed for most solar cells that has gotten so costly?

Bottom line, how will all of this impact the consumer in the next 8 years? Even some SWAG would be nice to see! What impact will the slowing economy have on the solar industry?

An example here, is a $31,904 system cost the homeowner after all the rebates $11,805 with an estimated payback period of 5-7 years. Bailout bill also includes array of solar incentives