If it runs like a dog, it still runs and therefore "minimum" requirements is a valid statement.
derrida sends us to an article in the Guardian by Jack Schofield explaining why he believes Dell won't offer Linux on its PCs. In the end he suggests that those lobbying Dell for such a solution go out and put together a company and offer one themselves. Quoting: "The most obvious [problem] is deciding which version of Linux to offer. There are more than 100 distros, and everybody seems to want a different one — or the same one with a different desktop, or whatever. It costs Dell a small fortune to offer an operating system... so the lack of a standard is a real killer. The less obvious problem is the very high cost of Linux support, especially when selling cheap PCs to naive users who don't RTFM... and wouldn't understand a Linux manual if they tried. And there's so much of it! Saying 'Linux is just a kernel, so that's all we support' isn't going to work, but where in the great sprawling heap of GNU/Linux code do you draw the line?"