Hyper-V PM Eric Bahna recently recorded a video demo of the new Hyper-V Windows PowerShell cmdlets in Windows Server "8* Beta.  The complete demo is about 21 minutes long.

    • Windows Server 8 Hyper-V PowerShell Demo Uncut

For convenience, I also made three shorter versions currently available on YouTube

The wiki article Hyper-V Cmdlets In Windows Server 8 links to all four versions.  If you would like to run the demo yourself, the script is available for free at: http://aka.ms/sd4fra the script to configure the environment for the demo is at: http://aka.ms/bzxqkr

You can read more about Windows PowerShell in Windows Server 8 on TechNet. The Hyper-V goodness is here: Hyper-V Cmdlets in Windows PowerShell.

See also Matthijs's blog: Using native PowerShell cmdlets with Hyper-V in Windows Server “8”