I know that Apple said to look for AirPower "next year" (2018), so I just assumed it would come out at any point this year. I was starting to think that they were aiming for later this year, however I never realised until today, but the iPhone 8 unveiling ad actually says that AirPower and a software update is available early 2018. I’m guessing they have had some production or safety issues with it. Hopefully it’s not too far off.