Thought I’d drop in this thread as well, and give a little heads up on the Windows 8 UEFI. UEFI is what Windows 8 will come with, however it won’t stop you from installing any other OS, unless the OEM doesn’t include the “Secure Boot” option in the BIOS. This is basically an attempt to scare users thinkin’ about moving to Linux off.
Here’s a quote from one of Microsoft’s Steven Sinofsky
…such decisions are left to the OEM. There may be good reasons why certain enterprises may not want PCs that can be configured in such a way, and there may be good reasons why an OEM or white box retailer may choose to allow that flexiblity (sic) for their customers. It’s all about choice and flexibility...
At the end of the day, the customer is in control of their PC. Microsoft’s philosophy is to provide customers with the best experience first, and allow them to make decisions themselves. We work with our OEM ecosystem to provide customers with this flexibility. The security that UEFI has to offer with secure boot means that most customers will have their systems protected against boot loader attacks.