The branding is arbitrary. If you want to read the tea leaves, it seems to indicate that Apple is going to incorporate more Mac-like elements into the iPad Pro,

The branding is arbitrary. If you want to read the tea leaves, it seems to indicate that Apple is going to incorporate more Mac-like elements into the iPad Pro, which from its inception has had some users struggling to make full use of it's power. The ad they showed it with involved Tim Cook "stealing" the M1 from the Macbook and putting it in an iPad. So if you want to predict, perhaps there will be some big software news at WWDC. But that's just speculation. There's nothing really different from what the M1 is and what people expected the "A14X" to be.