Hover cars were supposed to be a thing already, if I recall...
Smart planning doesn't assume the current mode would be completely obsolete, as new technology would still want to use existing infrastructure rather than front load a huge cost to implement.
HOV lanes will be a hard sell though...the implementations elsewhere I've seen have been around for a while now and are still not well regarded or even enforced. There's an initial blitz of police enforcement then nothing. I'll be interested to see how they handle it here.