I don't think it's aimed at the same market. I mean: I can run large sample libraries on my MBP, but I don't see that happen any time soon on an iPad. There's not enough disk space, and I don't see the whole NI library eco-system adapt itself to iOS (let alone custom players like EastWest or Spitfire).

But it's a great option for people who've outgrown GarageBand.