I’ve always thought that pre-installing GNU/Linux was a difficult business choice for hardware vendors simply. Mark Shuttleworth explained in a few words what I considered the most important reason why we can’t easily buy computers with GNU/Linux preinstalled:
we free software fans are a fussy crowd, and very hard to please. […] we are not “Linuxâ€ users,[…] We want a specific distro, and in
many cases also a specific VERSION of that distro.
I think he is totally right, even if we know there are hardware vendors that do offer GNU/Linux.