Will you be able to squeeze another year out of your devices, or will this fall be the end of the road for your shiny Apple gadgets?
It all depends on how old your devices are.
Note that while your device may still be compatible with the upcoming release, some older devices may not get all the features of the release.

iOS 14

Let’s start off with the iPhone. If your iPhone currently runs iOS 13, then it’s good news, because it will run iOS 14.

iPhone 11iPhone 11 ProiPhone 11 Pro MaxiPhone XSiPhone XS MaxiPhone XRiPhone XiPhone 8iPhone 8 PlusiPhone 7iPhone 7 PlusiPhone 6siPhone 6s PlusiPhone SE (1st generation)iPhone SE (2nd generation)iPod touch (7th generation)

Must read: WWDC 2020: Apple Silicon - What you need to know

iPadOS 14

Again, good news! If your iPad can run iPadOS 13, then it will get iPadOS 14.

iPad Pro 12.9-inch (4th generation)iPad Pro 11-inch (2nd generation)iPad Pro 12.9-inch (3rd generation)iPad Pro 11-inch (1st generation)iPad Pro 12.9-inch (2nd generation)iPad Pro 12.9-inch (1st generation)iPad Pro 10.5-inchiPad Pro 9.7-inchiPad (7th generation)iPad (6th generation)iPad (5th generation)iPad mini (5th generation)iPad mini 4iPad Air (3rd generation)iPad Air 2

MacOS Big Sur

Some big changes here, with the following getting the cut:

2012 MacBook Airsmid-2012 MacBook Pro2013 MacBook Pro 2012 Mac mini2013 Mac mini 2012 iMacs 2013 iMacs

Here’s the line-up of Macs that will get Big Sur:

MacBook (2015 and later)MacBook Air (2013 and later)MacBook Pro (late 2013 and laterMac mini (2014 and later)iMac (2014 and later)iMac Pro (2017 and later – all models)Mac Pro (2013 and later)

watchOS 7

If you’re still wearing a Series 1 or Series 2 Apple Watch, bad news I’m afraid.
Here’s what’s supported:

Apple Watch Series 3Apple Watch Series 4Apple Watch Series 5

On top of that, Apple is warning that “not all features are available on all devices,” so there may be a lot of segmentation here.