Today I built an experimental version of BGShell. It allows you to run cmdlets hovering over the Metro UI. BGShel also support some intellisence and shows objects’ properties.

The package is here.
A fly in the oinment is that it’s built for .NET 3.5. Nonetheless, all what you need to do is to agree with your test Windows 8 when it offer to download .NET 2.0/3.5.