Now it's only two years away.
A company has gotten seed funding to bring their photonic quantum computer to market. Yes, QuiX claims they will have something you can buy. The applications will be narrow, mostly it will involve simulating quantum simulation, because its processor does just one thing using silicon nitride waveguides, but it does its one thing at room at room temperature, rather than way down near the 0 degrees Kelvin range, which is a big step forward.
QuiX CTO Jelmer Renema says their photonic integrated circuit “is based on the proprietary TripleX technology of LioniX International. Their ultra-low loss waveguide technology enables us to produce sufficiently large matrices to facilitate complex calculations and thereby outperform classical computers.”
Here's to the future. Let's hope it's finally about to arrive.