Earlier quoted context omitted.
> The point of the article isn't that the machines will be Windows-only, but that dual booting may no longer be possible. It makes a point of emphasizing that secure booting will likely be easy for the user to disable, although that will disable Windows 8 as well. Never going to happen. Win8 will install on machines built for Win7. Win 8 is not going to refuse to boot on machines that have boot signing disabled.
That's not what we're talking about. We're talking about the Windows 8 Logo Program , which is basically that sticker on a new PC that says it is certified to run Windows 8.
Maybe Microsoft will require OEMs to support secure boot to be certified for Win8 (fine by me). That doesn't mean that the user won't be able to disable it if they want, and it definitely doesn't mean Win8 won't run when it's turned off.