This great advice will be promptly ignored. You can count on that.
I can understand there being an iPhone keynote in September and you asking in July if is worth it to wait. Sure. Because its so close, why not?
But the time between the last two ipad updates was 18 months and we have no clear idea when the next iPad will come or even way features it’ll have. My iPad Pro 2nd gen wasn’t worth upgrading to from my 1st gen. I only upgraded because my first one broke. But just imagine if I had gone without an iPad before hand and waited or something only to find out it wasn’t worth it. And losing out on months of using and enjoying a product to wait for something that hasn’t even been released yet.
Don’t wait. If you need it buy it.