It has just been confirmed. Macs are moving to Apple's ARM chips.

Edit 1: They are pushing the performance/Watt angle, as well as all their SoC features already known on other devices. They also say they will bring a "family of SoCs" to Mac.

Edit 2: All Apple apps will ship with native code at launch, including Final Cut and Logic Pro. MS and Adobe apps will also get native versions. There are going to be new "Universal (2)" binaries shipping with both x64 and ARM code.

Edit 3: Office, Lightroom, and Photoshop were shown working as expected.

Edit 4: It sounded like they just said "A12Z" in a Mac. I'm not entirely sure I got that right.

Edit 5: Rosetta 2 is announced. It's a translation layer from x64 to ARM. Apparently it does AOT translation, as well as JITting.

Edit 6: Working virtualization confirmed, in particular Docker.

Edit 7: They are showing Maya running in Rosetta. It seems smooth. Some Tomb Raider game is also running fine translated.

Edit 8: iOS apps are coming to Mac.

Edit 9: A "Developer Transition Kit" is coming, which will ship new hardware (Mac mini with an A12Z) this week. You have to apply.

Edit 10: They expect the transition to take two years. They also said there's still new Intel-based Macs in the pipeline.

Edit 11: That's all she wrote. I'm personally sad and slightly surprised that they weren't giving us any hard performance numbers. Be it raw power or battery life improvements or anything really. If they're shipping hardware now we're bound to find out very soon, though.