Plenty of what now?
Choice? A choice between scores of half-baked variants of a 1960s OS (Unix) is not a choice in any real terms. If anyone had come up to me back in 1985 or so while I was slaving over a hot VT-100 and told me that come 2010 Unix, or derivatives thereof, would still be around and be so widespread I'd have laughed (or more likely cried).
But here we are in the future and all we have to choose from are Windows in all its loathsome bodged-together glory, OS X (BSD in a fright wig and a red nose) and the wonderful world of Linux. Also, no flying cars :(