Don't Wait If You Need a Ton of Horsepower
As we noted, you can expect the iPad mini 6 to feature some performance upgrades. That said, if you think you might want a ton of horsepower on board your next tablet, you're better off avoiding the iPad mini line.
The iPad mini 5 features Apple's older A12 Bionic chip and an advanced Retina display with True Tone technology. It also features Touch ID instead of Face ID.
These features are enough for a lot of people, but the iPad mini line isn't a workhorse like the iPad Pro.
If you're planning to do intensive work like video editing or if you want the best gaming experience, you'll probably want to go with an iPad Pro over the iPad mini.