I believe that reaching 1 million will be important and symbolic enough. I don't think by then the news will be that, that 1 sat=$0.01, but that 1BTC=$1M.
This is what will be
on the newseverywhere but
some people think that it is very possible that people will not be using bitcoin for the price and use sat instead
as bitcoin price is increasing but which
which I do not find to be true. You can see what they are proposing with the BIP177 recently which they want to make sat to become bitcoin instead but which is totally nonsense.