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 everywhere 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 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.
Yeah that's not a good BIP, no longer using sat to discuss Bitcoins smallest unit would mess with the magic of Bitcoin.