Utilities could start giving away LED bulbs to consumers once they hit $20: the energy saved would allow them to postpone building new power plants and make up for the cost of the bulbs
Home Depot just started selling them in the low $30 range. $20 is not far off. Maybe Walmart will do what they did with CFLs and mainstream LEDs too. (They set a goal to sell 100 million CFLs in 2007, told suppliers to drop prices, and met the goal by early October – and in doing so pushed CFLs into mainstream America.)