Roadside architecture isn't dead. The structure above is the Mellow Mushroom located at one of the Anniston, Alabama, exits on I-20. It looks even more like a mushroom when viewed at a distance from the interstate instead up close in the parking lot.
I don't know if Mellow Mushroom has any other buildings like this one; all the Mellow Mushrooms I've seen here in Atlanta are in repurposed space, not new construction.