For an idea of what’s unfolding in terms of practical quantum computing, watch this 30 minute video from IBM. Midway through the video, Dario shows you the ‘magic machine’ which is one of the very few in the world today.
Take note that today’s Quantum computers are NOTHING compared to what is to follow pending innovations. Just as CPU’s went from hundreds of connected transistors to tens of billions on a chip, so will today’s 53 Qubit IBM processors go to hundreds, then thousands, then millions and eventually billions of Qubits! Don’t forget that today you can buy a high end desktop processor with 40 billion transistors, with the processing power roughly equivalent to a Mid 1990’s super computer all in one CPU package.