It's all arse about face..
The problem is not the fact that are no useful apps out there or that iPads are locked down. The problem is that most of the curriculum is delivered through the use of Word and Power Point. Still.
ICT needs to move toward platform agnostic solutions to educational tasks, not how do we emulate Word on this or that platform.
Identify the learning outcome and what skills and resources you'd need and then explore methods of achieving it. For example project work entails researching, collating, assembling and presenting material. Does it matter which platform this is achieved on? No not really. It should be possible to traverse platforms and environments, confidently, and produce the desired result.
In the school I work in we are moving toward platform agnosticism. I'm encouraging a mixed environment where no platform is dominant and work can be carried out on the best machine for the job. This is a big shift in the way we do things and conceptually is testing for teachers who struggle with the tech we already have. Children, on the other hand already do this without thinking about it, and can and do happily jump from phone to tablet to pc and back again. If we're going to keep them engaged and indeed keep up with them, we'd better get used to this, fast!.