Note: Following features are tested on Windows 10 Preview Build 10074 environment
Windows 10 Preview contains PSReadLine module at "%ProgramFiles%\WindowsPowerShell\Modules" (WMF 5.0 Preview don't contain this modules)
PSReadLine is automatically loaded when PSConsoleHost launched(if available). This feature can be controlled by following command.
[Microsoft.PowerShell.ConsoleShell]::UsePSReadline = $false
Windows 10 Preview contains Pester module at "%ProgramFiles%\WindowsPowerShell\Modules" (WMF 5.0 Preview don't contain this modules)
TabExpansion++ features seems to be included PowerShell core.
See: http://asaconsultant.blogspot.jp/2015/04/write-host-will-puppies-survive.html
Exaple: https://gist.github.com/altrive/c9b39f5bc8dcc8791274
Microsoft Event Tracing Management Cmdlets: https://technet.microsoft.com/ja-jp/library/dn919247%28v=wps.640%29.aspx
These Cmdlets will be available only Windows 10 or lator OS (because it use underlying CIM APIs https://msdn.microsoft.com/en-us/library/dn919685%28v=vs.85%29.aspx)
Example: https://gist.github.com/altrive/a9330830ae6fea83ad38
Copy-Item has new parameters -ToSession/-FromSession It transfer binary via PSRemoting using Base64 encoding. (It is relatively slow)
PowerShell ISE remote file edit feature use similar mechanism.
Example: https://gist.github.com/altrive/0decf052f0d0ebabfdf0
Enter-PSSession has new ParameterSets VmId/VMName for Hyper-V VM.