Samsung has a new Galaxy S5 ad out that makes fun of the iPhone. But instead of mocking the existing iPhone 5s, which outsold the Galaxy S5 in the latter’s first full month of sales despite being eight months old at the time, the company chose to have its fun at the expense of a product that doesn’t yet exist: The upcoming iPhone 6. FROM EARLIER: Check out this big iPhone 6 rumor round-up video Called “Screen Envy,” the new TV commercial reminds iPhone owners that the big smartphone screen they have been waiting for is already here, and has been here for a couple of years. Samsung is obviously well aware of the rumors saying Apple’s new iPhones will, for the