It's already been done, just not on very many qubits. Scaling up to more qubits is a tractable engineering challenge, and there's plenty of money on the table, so we have every reason to expect that practical quantum computers will emerge in the near future.

If, and that is a big if, quantum computing was here, you won't be reading about qbits.

All the headlines will be: "Heisenberg uncertainty principle violated; science, technology and life as you know it will change'.

This has nothing to do with 'engineering challenges'. You are dealing with hard cold physics limiting our understanding of the standard model, just because the barrier is there.