The iPad mini 3 wasn't a huge upgrade from its predecessor, offering just one new reason to buy: Touch ID. (Oh, and it came in gold.)

But rumor has it the iPad mini 4 will take design cues from the iPad Air 2. Fans of the smaller-sized tablets could be persuaded to splurge on a slimmer mini with upgraded internals, but we'll see if word on the street (er, the Internet) proves true. Here's what you need to know about what the iPad mini 4 has in store.

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What's the latest?

Leaked computer-aided design images from often reliable source OnLeaks indicate that the iPad mini 4 will be a svelte 6.1mm, just like the iPad Air 2. The iPad mini 3 is 7.5mm. OnLeaks previously posted photos of the next-gen iPad mini's casing, which didn't offer much insight into how thin it would be or what new features the smaller tablet would include. The leaked images reflect predictions in an earlier report from credible analyst Ming-Chi Kuo of KGI.

The rest of the rumors

It's not surprising that Apple would slim down the iPad mini--making devices thinner is always high-priority for the company. But the next 7.9-inch model may also mimic the iPad Air 2's 8-megapixel rear-facing camera and completely laminated display with anti-reflective coating, and could pack in 2GB of RAM.

There's no word yet if Apple plans to bake Force Touch into its new iPads, though there's talk that new iPhones will include the pressure-sensitive feature Apple first added to the Apple Watch (and then new MacBook trackpads). But we might see a trio of iPads at Apple's September iPhone event: an iPad mini 4, the iPad Air 3 (with a rumored A9 chip), and a 12.9-inch iPad Pro that takes advantage of the new multitasking tools in iOS 9. (It's that last one we're really looking forward to for productivity purposes.)

What else would you like to see in the iPad mini 4? Let us know in the comments.