National Geographic's The Great Energy Challenge has a great article comparing CFL and LED light bulbs. They address five concerns about safety risks, high cost and poor performance of the replacement technologies.
Read the article: Separating Myth From Fact on CFL and LED Light Bulbs: Five Concerns...
Keep in mind that incandescents are not outlawed. The law is weak and the manufacturers are responding by lowering the lumens to continue to sell incandescents. There also is one good incandescent called the Vybrant2x it has twice the lumens of the same wattage old fashioned incandescents.