In your view, shared by many technocrats, is that the SDC solves the negative problems of cars now: time now spent driving in an SDC can be spent reading, working, having breakfast, ... there's also the reasonable assumption that future cars will be electric, so the negative environmental effects of suburbs will be reduced. And SDCs will use the road more efficiently, reducing congestion, be safer, etc.. etc.. The way people lead their lives is more or less the same, but the SDC makes it better.
Many urbanists hold - paradoxically - the opposite view. The SDC will kill the suburb. They assume that the SDC will operate on a rental model. SDC's will basically be taxis. The reasoning is, that when people no longer own a car, they have no need for a garage. So why live somewhere that is completely designed for cars? Parking minimums will no longer be required and safer (and slower) SV traffic will make being out&about on a bike or two feet much more pleasant. The quality of city living, in other words, will hugely improve because we don't need to dedicate so much effort/time/money in storing and maintaining a car. Cities can be scaled around humans again, and not around cars sitting idle for 90% of the time. The role that suburbs serve - a place that's convenient to own a car - will no longer be necessary. Plus, the SDC does not really solve the major problem of the suburb; the long term financial commitment (public&private) to maintain the infrastructure required to support sprawl.
Both are positive predictions, so win-win?
The outcome will probably be somewhere in between, but IMO the SDC won't save the suburb. The popularity of the suburbs is particular to certain historical factors that likely will not repeat; (1) urban renewal and the willful destruction of downtowns to accommodate cars, (2) school flight of young families. For (1), only the old guard in fly-over country still thinks more infrastructure is better. They're almost dead. And (2) has been played out. City schools can only improve, and suburban schools will lose their competitive advantage once the affluent start moving back closer to downtown.
I also expect the real effect of the SDC will not be felt in the trendy coastal cities where urbanity was preserved. It will happen in all the mid-size metros where the core has emptied out and ended up basically 95% strip mall. For example, drive-till-you-qualify is hilariously irrelevant in many US metros. A lot of opportunity for an inversion of the dynamics.