Nope, Apple didn’t show off new Apple TV hardware on Tuesday. And Apple didn’t talk about new software for its Web video box, either. But it’s still coming. People familiar with the company’s plans say that Apple TV is scheduled for an internal overhaul on Sept. 18, the same day Apple releases its iOS 7 mobile operating software. The one new feature I’m aware of is a tweak to Apple’s AirPlay system. I didn’t do a great job of explaining this before, so here’s another stab: The new software will allow people who have purchased content from Apple’s iTunes store to play that stuff on other people’s TVs, via its AirPlay system. The key part is that they will be able to tell an Apple TV box they don’t own to stream the media they do own, directly from the cloud. That’s a change from the current system, which requires users to download stuff to their iPhones and iPads and fling it to the TV from there.