It's a real shame for bedroom producers like me, I've got a disposable income but not a spare grand for an iPad pro (plus I'm an apple anti-fan :-D ).
If Google had sorted out the audio story earlier, you might still have had problems with commodity tablets, but it might have been worth somebody's while to make a tablet specifically for audio and midi. It wouldn't be a million miles away from Maschine or something like that. But I fear the opportunity's gone now, and Android tablets are just a write off.
I still have my Nexus 7 which I basically use as a Kindle.
Unless Google start setting audio latency requirements, it's a lost cause.
http://superpowered.com/latency