Choice is too much
Those arguing against Ubuntu (or anything else that imposes a single standard) seem always to miss the point that the mass market does not want choice. They don't want to be able to choose a desktop, window manager, one of fifteen office suites and so on. My employers offer a B2B product that is immensely configurable and flexible. You wouldn't believe the number of potential customers who have recoiled in fright at that power - "it's too complicated, we don't want to have to make decisions, rather than have something that can be made to do exactly what we want we'd rather have something that we can't change and we'll get used to it." I'm not joking.
If Canonical with Ubuntu offers a single consistent user experience across devices and thus a convincing alternative to The Other OS, and thus gains wide acceptance for GNU/Linux I wish them well. And praise be to Debian, which makes it possible. The geeks amongst us can still fiddle and tweak with it, if we want.
