News Quantum Computing May Make Ray Tracing Easier

"% performance improvement" is not the same % as "% reduction in complexity". You can't reduce more than 100%. Is it hard to properly copy-paste in title what original paper said?
 
"up to 190% performance improvement " ... "significantly reducing " ...

Up to 190% is hardly significant, it is not even an order of magnitude. Regular (non-quantum) GPUs will offer the same "up to 190%" performance improvement in a year or two at most.
 
"up to 190% performance improvement " ... "significantly reducing " ...

Up to 190% is hardly significant, it is not even an order of magnitude. Regular (non-quantum) GPUs will offer the same "up to 190%" performance improvement in a year or two at most.
The improvement will still be possible regardless of the GPU generation. The idea of reducing intersections per ray is going to be key to optimizing performance at every step of the way.