BEST: Brookstone Big Blue Button
Daisy-chaining multiple speakers to create an ad hoc stereo setup is nothing new, but mixing and matching brands with this sort of Bluetooth bridge is unheard of. The Big Blue Button uses two antennae: one to connect to your phone, tablet or other source; and another to reach both speakers. If you can overlook the admittedly terrible name and design (Brookstone actually pulled its physical mockup from the show floor, because it was so ugly), it's easily one of the most surprisingly technical breakthroughs at the show. It will be out later this year for $70.