While Apple CEO Steve Jobs will almost certainly officially unveil the next-generation iPhone at the company’s hotly anticipated Worldwide Developers Conference next week on Monday, speculation abounds as to what Jobs might also reveal. Jobs will, of course, highlight new features in iPhone OS 4, which also powers the iPad and iPod touch. But what about a new version of Mac OS X? New Mac Pros, MacBook Airs, and Xserves? How about a cloud-based Apple TV? And what of the annual juggernaut — an iPhone that runs on Verizon?