Dewalt was just showing off the new 12volt line and were doing a screwdriving challenge. Fastest time each day screwing 5 screws won a 12v combo kit. They were also demoing a new impact clutch coming out soon. Here is a write up of that:
http://www.toolboxbuzz.com/tool-accessories/dewalt-impact-clutch/Sorry, nothing else new shown at the show. Hopefully Dewalt will have its own booth next year, they only had a small setup in the Lowes area this year. I was working the show so didn't really get a chance to walk around the rest of the booths and check anything out.
Porter Cable was demoing a new oscillating tool. Review here:
http://professional-power-tool-guide.com/2011/01/porter-cable-oscillating-tools-spotted-ibs-2011/