Current models do generate enough power.
A 100HP engine can generate about 75KW of electric power(given an ideal power conversion), if used correctly trough some magic electric thruster with a 100% efficiency rating it should be able to hold over 7500KG in an hover, normal cars weigh less than a third of that.
The main problem is really to convert that energy to motion, vasimir engines has an efficiency rating of like 0,000025N/W (though that engine is made for fuel efficiency not energy efficiency), ideally it should be close to 1N/W.
Ducted electric fans, and so on has a similar problem with efficiency and it's not until you get to helicopter sized blades it's really viable for lift, but then it's not really a flying car any more. and the noise pollution of millions of such cars would be a problem.
Riding om magnetic fields is a cute idea, but would require an prohibitively huge amount of power, also nothing could ever be made from ferromagnetic metals anymore.
So no the power is not the problem, it's power conversion into something useful that's the problem, and that lies may nobel prices away.