MDM
With MDM you can create secure containers and only allow certain apps to interact with your organisation's resources from within that container. Many people work for companies that don't believe their people need tablets to do their work, but the people find that they carry their own ones to work anyway, and can use it to make their lives at work easier. It just makes sense to allow it, but control it. Same thing with mobile phones. My company will only give me an LG L7 but I want to use my own Galaxy S3 (or read iPhone or whatever decent flavour you prefer) because the LG drives me nuts while waiting for the CPU to catch up to me. And I'm not all that fast...