Apple is in no danger of losing business, and the iPad's foothold in aviation is in no way being threatened by the lack of a new Mini. While many of us would love to see a new Mini introduced, most are willing to just live with the larger iPad.
It's not the hardware, it's the software which rules the roost here. FF and GP are by far the most popular products and while Garmin does build an Android version of GP, it's not nearly as well-supported and usually lags significantly behind its iPad sibling. No matter how one shakes it, for aviation, there's iPad, then there's everything else. That doesn't mean some of us can't find niche offerings which support our specific needs here and there, but for the most part, you're taking a big step back in capability when you leave the iOS platform.
Not a fanboy. Just realistic.