Though prices for solar panels have fallen—from $4 per watt in 2008 to around 65 cents today

I'm amazed that prices have fallen that far. So many are so bleak about global warming, but with things like this keeping up, with battery tech continuing to improve, I can imagine a world where we see those emissions rates plummet.

From wikipedia:

Coal power plants are generally one of the least expensive sources of electricity by this measure, at a construction cost around $2.10 a watt.

Solar panels are currently selling for as low as US$0.70 per watt (7-April-2012) in industrial quantities; the balance of system costs (inverters, racks, wiring, marketing) made the median price in 2011 of large (>100 kW) systems $2.60/watt in Germany and $4.87/watt in the US

Large wind turbines cost about $2 a watt.[5] Natural gas-fired peaking power plants are around $1 per watt ($1,000/kW) of electrical capacity.[6]

What we need, more than anything, is for solar panels, installation, and so on, to be cheaper and easier for a person to install and maintain than to pay ~5 years of power bills.