We're collectively producing more rice than we eat. Japan is stockpiling unused rice every year, and the world markets are flooded with cheap rice. Food insufficiency (starvation, malnutrition) is currently a problem of resource allocation, not production.
At the same time, the consumers in the big rice consuming countries aren't eating just "rice". You can typically find many dozens of very specific breeds of rice with differences in flavour, texture, firmness, size and so on. And that's within a single type (Japonica, say).
I suspect this would only be useful for rice grown for feed or as an industrial crop. But for feed, source of starch and so on there are already other, well entrenched crops available, so I don't see much of a practical impact of this development.