sample output here - https://www.science.org/action/downloadSupplement?doi=10.112... This is at the very beginning of begin feasible. I do not know anything about photonics, maybe someone who does can comment on scalability?
So in general this would be something that you would potentially be able to see in cars, but unlikely consumer electronics or handhelds without a modification in the operational principle (eg time-multiplexing to reduce the required number of fibers).
My personal opinion is that competing on low-power and small-scale is a lost cause for photonic computing. In terms of absolute energy efficiency and absolute miniaturization, photonics will never win. But at larger energy scales and larger systems, photonics can reach a regime where higher parallel throughput will dominate.