I was just talking with my wife about the Japanese 500 and 1000 yen coins, how they're worth $3 and $6.50 respectively. I said that I predict the US will stop printing one dollar bills and release all those 2000 Sacajawea dollar coins that are currently sitting in storage. Also stop printing 5 and 10 bills, and produce new $5 and $10 coins. Maybe with Trump's face on them!
I think the penny has stuck around so long as a psychological operation for the masses, an assurance that we haven't submitted to currency debasement, that a penny still has enough buying power to be worth minting and circulating. But now the facade is over, the psychological operation has been deprecated and the public will have to accept that today's "dollar" is yesterdays' "quarter".
You can still buy some tacos with change in your car.... it'll just be $1 and $5 coins.