In the modern world, when scientists are daily developing new technologies in the field of medicine, space and military affairs, even the slightest deviation from the standards of the international system of units of SI can cause a catastrophe. In order for all countries to support a single idea of ​​the weight of a kilogram, the length of a meter and the properties of other quantities, their standards are stored in France, and all countries are compared by copy. If the standards of the meter and the second are the fundamental laws of physics, then per kilogram is a piece of metal. To avoid problems, scientists intend to abandon the standard of the XIX century.

The actual kilogram level was created in 1889. It is stored at the headquarters of the International Bureau for Measurement and Measurement (BIPM) and is a cylinder made of an alloy of platinum and iridium in a ratio from 90% to 10%. With a height and diameter of 39.17 mm, it is stored under two hermetic glass caps and is often mentioned in the publications of Le Grand K.

Le Grand K

To compare the concepts of kilogram between countries that have adopted a metric convention, 80 copies of the standard were created. Their mass is compared with the standard mass every 40 years, and it was noticed that the difference in their mass reaches 50 micrograms. Even a misunderstanding between countries at this level can be a source of disaster. The reason for the difference can be any, for example, the absorption of molecules by molecules from the air or weathering.

To solve the problem and avoid disasters, the Bureau of the BIPM will hold a special meeting on November 16, 2018. Within its framework, a final decision will be made on whether the replacement of the current standard will be more moderate.

Source: https://www.realgeeks.com.ng/scientists-will-change-the-weight-of-the-kilogram-to-avoid-disasters/

I don't think it would have effect on since per se. Since the dawn of the 20th century they have been rewriting physics.

It will only affect existing literatures and I believe if they have to change the stand unit the figure should not affect the physics.