"satoshi" or "satoshis" is already a term in Bitcoin. A satoshi is the smallest unit of one bitcoin, so
BTC0.00000001.
Here's a conversion source for you, you'll find the conversion of a satoshi at he top of the list --->
https://www.bestchange.com/converter/Given all the hidden inflation when it comes to USD, eventually we're bound to hit parity.
And Bitcoin hit parity with the US Dollar when
BTC1 = $1...a long, long time ago.
For a satoshi to reach parity with the dollar a Bitcoin would have to be worth $100,000,000. So, yeah, let's say "were bound to hit parity", but "eventually" is a very long, long time in the future.
If we want to get to that point, it's probably best not confuse the general public with a name change.