I'm always skeptical of this kind of news (but thanks for sharing it regardless). Even if it works, it won't be the first solution we get, and the others still have yet to be put to use.
A better alternative is to try to eat less meat and dairy. I tried it a few years ago, slowly adding more vegan meals to my diet and it was surprisingly easy for me (but first I tried out various types of vegan or vegetarian foods to see what I liked). Better for the environment, better for the cows, better for me. I never quit completely but I rarely buy meat at the grocery store anymore. Even reducing significantly I feel can have an impact.
Even without the methane, raising cows still emit a significant amount of gas that cause climate change.
Of course on a wide scale if it was required for this industry then it would be great. But this is the kind of solution that gets in the way of reducing subsidies to animal farming (or regulating it further). So I'm wary it might be used for greenwashing or only when the pressure mounts to affect that industry in a real way, as a delaying tactic to evade more drastic measures, which might be more efficient at preserving the climate.