Point your camera at a product's UPC (or cover, if it's a DVD or book) and Google Shopper will generate a list of prices at online retailers — from giants like Amazon and Walmart to niche sellers. Sort by price and filter by free shipping to reveal the best deals.
WIRED Lets you mark favorite products for browsing later. GPS shows local brick-and-mortar availability.
TIRED Doesn't filter out redundant search results. Voice search far less refined than what we've come to expect from Google.