Harbor Freight, a low end retailer of low end tools and hardware, is offering a 45 Watt solar panel for $169.99, or $3.77 per watt. Same catalog offers a 800 watt gasoline generator for $99.99, or $0.12 per watt. Or, a utility can buy a 1 Gigawatt nuclear plant for $6 billion, or $0.006 per watt.
Solar cells are not going anywhere because they cost way too much. And they don't give any electricity after the sun goes down, which is when I really want my electric lights to work.