Unfortunately this is still an Enterprise only feature. From Windows For Your Business blog
Here’s an overview of some of the key features that will be available exclusively to Windows 8 Enterprise customers (and note this is not an exhaustive list):
- Windows To Go is a fully manageable corporate Windows 8 desktop on a bootable external USB stick. This will allow IT organizations to support the “Bring Your Own PC” trend and businesses can give contingent staff access to the corporate environment without compromising security.