More and more little jewels of information are coming out of the WinHEC keynote that Microsoft delivered in China this week.
The latest is a commitment to make future Windows Phone upgrades available to all users within 4-6 weeks of release. The initiative is known as Milkyway and leans on the Windows Insider program, and new standards for testing and release in order to get OEMs and carriers through the certification process quicker.
That's a big step forward, and is likely a result of the changes in the way that Windows 10 Phone will work. So naturally the Windows 10 update won't be itself be part of the commitment.