Microsoft already have a website called BuildWindows.com running to show case their upcoming products to the 
developers and system builders to get things ready for upcoming technologies.
Windows 8 tablet and new metro UI design was first showcased via this platform and Build would be hosting a conference next month to demonstrate few technologies, according to Microsoft, which would change everything.
Leading into the conference, a new blog post on Build Windows, hints that Microsoft may showcase a pre-release version of Windows 8 over there.
http://blogs.msdn.com/b/b8/archive/2011/08/15/welcome-to-building-windows-8.aspx
Nothing is sure yet, but since Build is just a month away, it may be right time for Microsoft jump start some hype about Windows 8 and nothing better than few early preview of Windows 8.