Earlier today, Apple launched its "iBeacon" initiative in its U.S. retail stores, allowing users of the company's iPhone app to opt in to receiving location-specific notifications and access to other information while browsing in the stores. Following the announcement of the new system, ISI analyst Brian Marshall headed over to Apple's Fifth Avenue store in Manhattan for a first-hand look, and he came away with a "mixed-to-slightly negative" impression, failing to meet his expectations. While the system conveniently notified Marshall while he was browsing accessories that he could use the EasyPay self-checkout feature of the iPhone app to automatically charge products up to $200 to his i
