I think you miss the point of BYOD in major corporations. The companies are OK with saving IT costs by letting employees bring and use their own devices. However, they need to protect their data. Most companies have an extensive Microsoft Active Directory structure (AD) in-place to enforce access rights to sensitive resources. (I've found that even Apple shops use Microsoft's AD for this purpose.) Unless the employee's device can authenticate to AD, the company will not let it access any sensitive resource (like files.) This ability comes native with any "Pro" version of Windows and Macs (those devices with Intel Chips). Most ARM based devices do not have the ability to authenticate to AD. Even the new WindowsRT lacks this capability. As such, they are basically dead-on-arrival as a BYOD device. They will be able to web surf, but little more in most companies.
Providing a way for Android and iOS devices to securely access corporate data is so fundamental that I'm sure there's a way to do this people are using and have been using for a while now that you or your organization are just not aware of. Without this BYOD would never have been coined.