[Rynant]

If you type: dir -<Ctrl+Space> PowerShell will list all available parameters below, and allow you to tab through them.

The tab completion is not static either. If you type: ps <Tab>, it will tab through all the current processes.

[cm2187]

I you type "Start-VM -name <TAB>", it won't list the list of the VMs, but rather the list of the files in the current directory. That's not exactly what I would call insightful.

I didn't know about the CTR+SPACE. That being said it doesn't seem much more insightful than TAB. And no description of what the argument does.

[Rynant]

The issue with "Start-VM -name <TAB>" is not an issue with Powershell itself, but with the Start-VM cmdlet; the Start-VM cmdlet could have been designed to complete from the list of VMs.