A key item is the products that will run iOS 13 (and iPadOS).
If you currently use one of the following devices, then you're all good for getting the upgrade, and continuing to have a supported device for another 12 months. If however you use an older device, then it's time to start thinking about replacing it post October as it means no new security updates that come with the new version of iOS.
iPhone XS
iPhone XS Max
iPhone XR
iPhone X
iPhone 8
iPhone 8 Plus
iPhone 7
iPhone 7 Plus
iPhone 6S
iPhone 6S Plus
iPhone SE
iPod Touch (7th generation)
12.9" iPad Pro
11" iPad Pro
10.5" iPad Pro
9.7" iPad Pro
iPad (6th generation)
iPad (5th generation)
iPad Mini (5th generation)
iPad Mini 4
iPad Air (3rd generation)
iPad Air 2
Some of the changes announced are -
For more on the new features, you can search "iOS 13 new features" on Google or Bing, or read one of the many articles written about them here.
The next version of MacOS will be called Catalina. The list of supported Macs follows, and if you're still using a Mac that isn't on the list, then it would be time to start looking at replacing it around October when Catalina is released.
Some of the changes announced for the next version include -
watchOS 6 is the next release for Apple Watch. It will support the following models -
Basically every model except the version first model that was released.
Some of the new features include -
No indication of which Apple TV devices were supported was provided.
Some of the new features announced are -