This would improve greatly physical, mathematical and tecnological cooperation with other countries in scientific and engineering endeavours...
And at least lets face it, when it comes to the really small, nanometers are already used (for instance processor and advanced electronics production), aside from the fact that it is much more easy to understand and use(1Meter=10Decimeters=100Centimeters=1000Milimeters=1*10^9Nanometers), its not base on the length of the thumb of feet of a long dead british king...
Obviusly this change wouldnt be made over nigth but will have a transition period(kind of like when most countries in europe changed their currency to the euro)
I belive this would make a stronger better america in the medium/long run...
Why Is This Idea Important?
This would improve greatly physical and tecnological development in scientific and engineering endeavours... and join the Rest of the World in having a standart, understandable and efficient measurement unit.