I also have to add that, so far, we know only a handful of algorithms which might run on a general quantum computer (if we had one!). Among those, only two performs something which would actually be useful (Grover and Shor). And we have only those, not for a lack of trying.. it's because coming up with quantum algorithms is intrinsically complicated (it's definitely not like writing an algorithm for a classical machine). So those quantum bits could be, in theory, the most stable thing in the universe, I'd still see them as irrelevant in everyday applications.