We're about as certain as it gets regarding something you haven't seen that the iPhone 5 will have a big 'ol screen. There's been prior evidence—and this might be more: a leaked screen protector and possibly-revealing case.
BGR spied the leaked case accessory, which briefly made an appearance on Case-Mate before they yanked it down. It corroborates what we already thought: thinner, wider, and imbued with what looks like a tapered, teardrop body. Oh, and is that an aluminum back I spy? I hope so.