Bink is reporting that Hyper-V has been released to manufacturing. You can expect it to be available as a download and via Windows Updates. There should be a smooth migration from the RC1 release to RTM.
Credit: Bink.
EDIT:
This has been confirmed.
Credit: Willem Kasdorp.
EDIT
The Hyper-V team has released some details. The update will be available via Windows Updates on July 8th. The direct download will be available from sometime later today (probably midday Seattle time or 20:00pm GMT).