Unless there is some enormous revolution in battery technology that makes state-of-the-art Lithium Ion / Lithium Polymer batteries look as antiquated as lead-acid, AND is cheaply and easily mass-manufactured, Plug-in Hybrids (PHEVs) are going to be a better option for most people through the 2010s and 2020s.
The reason is simple: When the range of your vehicle can be measured in a few hundred miles, you are going to need to refuel or recharge quite often. Problem is, the only place you can guarantee the availability of charging apparatus (and the permission to use it) is on your own personal property. If you're very very lucky, you might be able to secure access to this at your place of employment -- but if you switch jobs, all bets are off.
Since gasoline stations are omnipresent almost anywhere in the civilized world, not only in the U.S. but worldwide, having your vehicle ultimately rely on gasoline as a "fall-back" or "range extender" means that you could, in a pinch, get in your car that's out of battery juice and has 1 gallon of gas in the tank; go to the nearest refueling station; fill up; drive several hundred miles; and repeat that several times to get from one end of the country to the other. You'd only spend a total of about 30 minutes refueling throughout your long journey.
So a PHEV can be relied upon to have "virtually unlimited range" (assuming you have unlimited money to pay for the gas) if you have a sudden, pressing need to go a long distance. You cannot rely upon a pure EV because you have no idea where you'll be able to find a recharging station, and even if you do, assuming it's compatible, it will take at least 45 minutes to an hour to get a good charge going (until EV batteries are based on supercaps or something that can recharge in seconds, but that's yet to be commercialized, much less mass-manufactured).
200 miles isn't a lot. Back and forth to work; run some errands; drive across part of a mid-Atlantic state to visit a relative; and you've driven 200 miles. Better hope grandma can bring out a long extension cord to charge up your car on the 120V overnight (assuming the current draw doesn't pop her 1970s-era circuit breaker faster than an electric lawnmower will).
I want to see more PHEVs with a range long enough for your ordinary commute on pure EV, but with a range extender (basically a gasoline-powered electric generator) that can give you range competitive with traditional gasoline vehicles. The nice thing about PHEVs is that you can make the battery a little bit smaller than the enormous ones Tesla needs for a 200-mile EV, which cuts down the cost into the 30k range quite easily. Tack on a medium-sized government subsidy and you're looking at sub-30k prices for a vehicle that might only use gasoline weekly or bi-weekly if the driver can fit their round trip commute in on the EV.
This is possible TODAY. To avoid the appearance of a shill I am deliberately not mentioning any manufacturers or vehicle models. But I really don't think people will be able to buy pure EVs until there is an Earth-shattering revolution in battery technology that would enable 1000+ mile range OR near-instantaneous charging; and even then, we'll need to build up a near-omnipresent charging infrastructure before you'll see very much adoption.
Meanwhile, with PHEVs, smart owners can continue to demand that the infrastructure for EV charging will build up, while still having a fallback if absolutely needed. The fallback of gasoline gets about half the MPG (i.e., costs twice as much) as using electricity produced on the grid, so drivers have a financial motivation to ask their workplace, local convenience stores and gas stations, etc. to have advanced high-speed chargers. This demand and the resultant market response will help build up the infrastructure WHILE we are getting our ducks in a row to prepare for the full-on EV revolution. Therefore, we avoid the chicken and egg problem by phasing in the demand, and we don't inconvenience consumers in the near term by allowing them to fall back on 20th century fuel so they can get to where they're going.
I want a full EV future as much as most people do; I think virtually everyone agrees we have to stop using fossil fuels. The first step is to reduce our dependency on them for transportation, followed shortly by eliminating our dependency on them for transportation. Then we can continue to phase in higher and higher percentages of renewables into the electricity grid, without asking anyone to buy a new car to take advantage of the improved grid, since electricity from any source is compatible with all electrical vehicles by design.
Baby steps, guys. It'll happen. I severely doubt Tesla's introduction of a 200 mi EV in the 2010s is going to make a dent, though, as much as I wish it would. Affordable PHEVs will drive the demand to build the infrastructure that will then, in another decade or so, make the 200 mi EVs feasible for most people.