probability theory – Is Quantum Computing a serious usable instrument for IT-Industry?

Following this latest and very exiting research object I can´t find till now a usable Computer in that style.

I would like to call actual Quantum Computing by the topic “Researching of Quantum Elements for computing”. Till now I found only expensive and complex Quantum Circuits.
We don´t have usable, steerable elements to get definitive decisions by switches. We can´t find that elements in that subatomic level. We only follow mathematical rules coming from probability formulas.