There are already four Apple Stores in New York City, including the famous Fifth Avenue "Cube," but the new store could likely become just as renowned. Grand Central is a prime location in the city, with 750,000 people passing through its gates daily. The Apple Store iOS app recently got an overhaul, allowing U.S. customers to skip the checkout process and pay for certain items themselves, among other things. It'll be interesting to see if Apple tweaks its already tried and true shopping experience.