Here’s when and how you can get it.
With Windows 7 and Windows Server 2008 R2 you will get it as a built-in component starting August 6th or a little bit later depending on which channels you can access – see full schedule here.
For Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008 – you will need a separate free download with new remoting (WinRM) bundled in. This is coming within a few months (this did not really change since the original schedule announcement).
Also, Jeffrey Snover tweeted a few weeks ago that there was a plan to have a public CTP4 between now and the release to keep us excited while we are waiting.😉
Hope this makes it a little more clear.