Quantum Logic Gates, How Close Are We To Making Them Work?

I still think that the next significant leap in computing capability will not be a hardware improvement but a software improvement that will somehow mitigate software bloat. I have no idea if this will be achieved by better code to code interface standards, data hierarchy, cross programming language standards or what? The dramatic improvements in hardware speed and memory depth has rescued sloppy coding techniques over the years. If somehow the code could be made tight or wasteful loops minimized I suspect all of our computers would astound us.