It's not a new feature but it's something that I used yesterday for the first time. A week ago I came home to find that my Multimedia PC was dead, apparently the surge protector where I had it connected was not good enough or the power supply just stop working. The repair cost was high enough to convince me to buy a Backup Battery. I did a little research online and found in Office Depot what I was looking for so I headed to my local store to buy it. Unfortunately, they did not have in stock the one I wanted and the next in line had a price tag of $47. Like 10 dollars more than the one I wanted. Then it came to my mind to do a search for a better deal scanning the barcode with my Nokia 810 with Windows Phone 8. I open an Apps called Scan, pointed the 810 to the barcode and few seconds later I had a list of three local stores selling the same Battery, one of them for just $40. The rest was just negotiation. I asked the cashier if they match the price of other local stores and when she said yes I showed to her my search results. I had to scan the barcode on front of her again to convince her that I was not lying and that did the trick.
So my Nokia 810 saved me $7.
The other trick I used this Christmas was to ask my Nokia for the Closest stores and then drive there using Nokia Maps. Both, the search and the navigation worked like a charm. And the Amolet display performed a lot better outdoor than my old Nexus One Display.