You probably want to try out the preview release—and you can. Starting later tonight you can download the Windows 8 Developer Preview. This includes a 64-bit (x64) build with development tools to build apps, and a 32-bit (x86) or 64-bit (x64) build without development tools. The releases also include a suite of sample applications (please note these are merely illustrations of potential apps, not apps that we intend to ship with Windows 8). The ISOs are linked to from http://dev.windows.com.
At this point it’s still unclear if you will need an MSDN subscription to grab a copy however they did say that because this is just a Beta / Dev Preview version, an upgrade from Windows 7 is not supported – you will need to do a full install.
Bummer… It also looks like I should have tried to attend the BUILD or PDC conference this year because apparently Microsoft had an Oprah moment and gave away a new computer with Windows 8 running on it… Good move for Microsoft. Can’t think of a better way to get DEV’s excited about a platform. If it’s good enough for Google, why not Microsoft!
Stay tuned for some deep coverage of Windows 8 after the release tonight.