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There are expensive dedicated devices that do 3D scanning (like the high-end tablet in Google's Project Tango), and versatile but bulky add-ons, like the Sense from 3D Systems, but it's not a capability built into the typical cellphone or tablet. That could change, thanks to a microsensor being prototyped now (at low resolution) at CalTech. From The Verge's coverage: The tiny chip, called a nanophotonic coherent imager, uses a form of LIDAR (Light Detection And Ranging) technology to capture height, width, and depth information from each pixel. LIDAR, which shines a laser on the target and then analyzes the light waves that are reflected back to the sensor, are best known for their use in precision-guided missile systems and self-driving cars.

While LIDAR itself isn't new, [project lead Ali] Hajimiri explains that "by having an array of tiny LIDARs on our coherent imager, we can simultaneously image different parts of an object or a scene without the need for any mechanical movements within the imager." Each "pixel" on the new sensor can individually analyze the phase, frequency, and intensity of the reflected waves, producing a single piece of 3D data. The data from all of the pixels combined can produce a full 3D scan. In addition, the researchers' implementation allows for an incredibly tiny and low-cost scanner, all while maintaining accuracy. According to the researchers, the chip can produce scans that are within microns of the original.

A number of companies are either selling or preparing to sell 3-D scanners. Aside from fun (but interesting) uses, like duplicating chess pieces or possibly reproducing a miniature of Rodin's famous sculpture, Fallen Caryatid Carrying Her Stone, Matterform anticipates archeologists reproducing artifacts so that students can study them without handling the precious originals. This video is an interview with Matterform co-founder Drew Cox, who was exhibiting Matterform's scanner at CES 2014. MakerBot is also selling a scanner, as are a growing number of others. In fact, even though Matterform talks about being a low-cost (pre-order price $579) scanner for home use, as opposed to a commercial one that costs thousands. There are also several interesting hand-held scanners out there. Sense sells theirs for $399. Structure has one for $349 that's essentially a peripheral for an iPad. And this is just a random selection from a brief Google search. Use "3-D Scanner" as your search term and you'll find multiple Google pages full of 3-D scanners and information about them -- including software being developed at ETH zurich that turns your smartphone into a 3-D scanner.

There are other 3D printers out there, but Cubify claims theirs is easier to use, has easier cartridge changes, and is all-around nicer and cooler than their competition. And Timothy Lord found them at Google I/O 2012, which means Google thinks they're cool, too. Wow. At only $1300 for their basic model (plus $50 each for the plastic "print" cartridges), every home should have one of these. Or maybe two or three. Or maybe Hackerspaces will buy all of them, and that's where we'll go to satisfy our lust for 3D printing.