I’m a Mathematica addict and (as I have remarked elsewhere) rely predominantly on iPads as my platform of choice. Sure, Wolfram Online works fine when a network connection is available, but I’m really, really, really hoping that sooner rather than later they’ll release a fully fledged notebook & back-end kernel version of Mathematica for the iPad.
This shows some flexibility on their behalf, but it’s moving in the wrong direction (as far as I’m concerned, at least).