In the recent times, we got great changes to the plasma and hyperspace techs. The laser tech could be next.
My proposal is that it should reduce the cost of buildings by 1%, which is small enough to not be overkill and large enough to make a worthwhile impact at higher levels. I can easily see miners dump hundreds of millions of resources and a month of research to get laser 24 because the investment will be repayed when they build new mines, and thus make laser just as important as plasma or astrophysics in the optimization of a build order.
Optionally, the change could affect only metal and crystal costs, because a better laser cutting precision means less material wasted in the process of building, while its functioning cost (deut) is unchanged.