At the risk of injecting a dose of reality to this little pipedream...

I can't imagine it could happen before PGMusic makes BIAB AS compatible and Apple builds an iPad capable of hosting BIAB Audiophile alongside Logic Pro.

Rosetta 2 isn't an option for iPadOS and having only 2TB potential onboard storage isn't enough. Yes, you can load external libraries from a drive but if you're going to do that, far better off with a MacBook Air. Add a decent keyboard case to a 12.9" iPad Pro, it's a little larger and heavier than a 13" M2 MBAir. Yes, really.

Configured the same including a keyboard, decent amount of storage & a USB-C charging hub, a 12.9" M2 iPad Pro is more expensive than a 13" MBAir M2 (around $500 more if maxing the storage of both to 2TB). The MBAir has two TB3/4/USB-C ports plus another for the MagSafe charger, meaning it doesn't require a USB-C hub to add charging, an interface and external storage. Plus you can run any DAW you want including LPx which @ $199 by itself or in the Pro Apps Bundle for Education with Main Stage/FinalCut Pro/Compressor/Motion, none of which have Subscription. 1TB–8TB Thunderbolt 3 external storage can be had for <$150–$900 if you know where to look. —— Of yea, you can do all of this today.

BIAB 2024 Audiophile Mac
24Core/60CoreGPU M2 MacStudioUltra/8TB/192GB Sequoia, M1 MBAir, 2012 MBP
Digital Performer11, LogicPro, Finale27/Dorico/Encore/SmartScorePro64/Notion6 /Overture5