The classic example, though, is factoring large numbers using Shor's algorithm. In order to do this, you have to rotate qubits many times at very small angles, which would instantly be wiped out by noise. I doubt Shor's algorithm will ever work for large numbers.
It is not ordinary computing, is applies to a very limited set of problems.
The buzz is that it is strong at cracking cryptography, but that's about it with what we have today. The rest is scientific exploratory statistics.