OK, if you are a roofer or plumber working in obscure places without power, sure. But does the world's DIYer really need all these cordless tools -- routers, table saws, chain saws, jig saws, recip saws? What does a new 32V battery replacement cost? And what happens when it gives out two cuts before you are done?
I have a drill-driver because I'm often working in someone's home and don't want to have to string extension cords all over the place. And most of the time I'm driving screws that don't work all that well with a corded drill. But in the shop, I'm rarely more than 6' from an outlet.
A number of years ago, there was a trim carpenter working in the home where I was. He had a battery powered brad nailer. I have a compressor that weighs about 25 lb and hoses are no problem when I'm working in one or two adjacent rooms. Even if I have to unplug it, I can do a door frame on the tank. And I don't have to wait for the "bam, whizzzzzzzzzzzzzzzzzzzzzzzzzzzzzz, click, ..." (onomatopoeia)
http://www.popularmechanics.com/home/tools/reviews/g1358/12-great-tool-gifts-for-diyers/?slide=1&src=socialflowFB