Invisible shopping centers? Retail's new reality
Forget building new stores. Retailers are using invisible shopping centers and other "augmented reality" to boost sales. · CNBC

Some of the largest retailers have been looking at augmented reality (AR) for years as one of those technology advancements with huge potential to reach shoppers who are constantly on their mobile devices, aiming to connect with shoppers while either in the store, or even while outside the store to bring them into the store. AR can touch everything from shopping aisles to product displays to even fully immersive stores, creating a series of virtual assets that retailers are experimenting with in a big way.

Retailers are exploring AR's huge potential to boost sales, doing so by purposely blurring the lines between online, mobile and the real world. Since consumers visit physical stores to touch, feel and see products before making a purchase, there is no longer a clear line of differentiation for retailers looking into implement AR within the four walls.

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And it goes beyond AR. Google (NASDAQ: GOOGL) has partnered with investors to put a reported $500+ million investment into Magic Leap, which has filed patents for a device called a WRAP, a Star Trek like AR device with the space age sounding name standing for Waveguide Reflector Array Projector (WRAP), and shows how the tech giant aims to help change the way consumers purchase products through 3D in-store advertising and interactive entertainment.

As more AR proponents aim to make the technologies more mainstream, here's a look at four ways that big-name retailers are bridging the digital experience with the real world to enhance the shopping experience.

Location, location, location. AR today is used for many practical applications, and can be one of the least expensive ways to expand a business to new locations, doing so without the enormous costs of constructing a physical entity or paying for real estate.

China's largest online grocer, Yihaodian (51 percent owned by Wal-Mart (NYSE: WMT)), is using AR to bring its products to the people, doing so where they live, and work, and play - without building a single store. The retailer has set up 1,000 "virtual" stores in parking lots, parks and in front of famous landmarks. These stores are completely invisible to passersby's who aren't connected to a mobile device. But, bring up the Yihaodian app on your smartphone, and suddenly you'll be able to see an entire grocery store through your screen. Shoppers can walk through the virtual aisles, selecting items simply by tapping on the screens of their devices, then arranging to have their groceries delivered directly to their homes when they're done.