Whether inspired by Hurricane Sandy or "The Walking Dead," a number of intriguing gadgets promised to help users handle emergencies. The Luci inflatable lantern, for example, is both solar-powered and waterproof.

Also popular were mobile-charging devices that offer backup power on the go for smartphones and tablets. These battery packs can be pricey, though. The solar-powered Yeti 150 generator has enough juice to power a smartphone for 15 hours, but it will cost you $400.

The junk

CES is huge, spanning 1.92 million square feet. For every interesting gadget or prototype, there were dozens of small booths hawking digital detritus.

Though Apple doesn't have an official presence at CES, the iPhone accessory was a popular item on the show floor, There was a neverending supply of cheap cases, covers, Bluetooth keyboards, power packs and charging stations for iPhone and iPads.

Speakers and headphones were as omnipresent as flu germs. Some big companies introduced cool audio products, but the big trend continued to be celebrity-endorsed headphones. Beats by Dre has done so well that every earbud now clamors for some famous support, even from the likes of Motörhead frontman Lemmy Kilmister or, um, "The Jersey Shore's" Snooki.

Finally, there were the massagers. There wasn't anything terribly innovative or new in the massage field, but the booths demoing massage tech were always packed with stressed-out or weary attendees who needed a little back rub after wandering the show floor all day. The latest trend in this field? Little robot massagers that wander around on your back. We'll find out soon enough whether they catch on in the real world.