Vista will support EFI in the long run

Microsoft has made an about-face on EFI support in Windows Vista. While the company had announced that the next revision of its OS would not support it, they have since announced that a prerelease support for it would be included in the next beta of its OS.
The problem is not simple for them because the development of EFI in an advanced language is simpler than that of a Bios for hardware manufacturers, and so it can strongly differ from one manufacturer to another. Which is why Microsoft wants the consortium which defines this standard to formalize it as well as possible.
Will Apple try to follow these modifications? It will be a political choice, as if they do it will be possible to legally install Vista on a MacIntel without OS X.