The real threat here is that Windows 8 Logo computer will prevent GNU / Linux from booting as part of the "secure boot" process. When combined with anti circumvention legislation it could even make it illegal in certain countries to install GNU / Linux on certain computers since one would have to crack the DRM in the UEFI boot loader in order to boot an "untrusted" binary. The legal situation would not be different for example to cracking the DRM on a PS3 in order to install GNU / Linux on it.
Here are some articles with some the early warning signs.
UEFI Secure Booting by Mathew Garrett
UEFI and "secure boot"