If you think it should remain possible to install operating systems on general-purpose computers other than the one they came with, you might want to read about the FSF’s campaign to make sure manufacturers preserve this freedom when implementing the new “Secure Boot” feature, and then sign the statement about it.
We, the undersigned, urge all computer makers implementing UEFI’s so-called “Secure Boot” to do it in a way that allows free software operating systems to be installed. To respect user freedom and truly protect user security, manufacturers must either allow computer owners to disable the boot restrictions, or provide a sure-fire way for them to install and run a free software operating system of their choice. We commit that we will neither purchase nor recommend computers that strip users of this critical freedom, and we will actively urge people in our communities to avoid such jailed systems.
I’ve emailed my MEP (Andrew Duff) about this with a layman’s description of the issue and why I personally think it’s a problem, and had a good response; he’s confirmed that it is an issue that can be dealt with at the EU level, and he’s written to the commissioner whose remit this falls under.
(I noted that since manufacturers tend to bundle affiliate software with their computers, they have a financial interest in stopping people installing other OSes, and also that anything that makes it harder to swap out bits of hardware or software for unsigned replacements will tend to increase the number of machines being landfilled rather than upgraded)