Bonaire, you may be onto something with the DC only cars. When you're trying to make a $35k car, whacking off $1k or so for an onboard charger makes sense.
Another note about Supercharges is that I think they will be key to the urban charging problem. This is in distinction to the original intention of Tesla just to use Superchargers to fascilitate intercity travel. Within dense urban areas parking infrastructure is expensive and many people do not have garages for convenient at home charging. Solutions in this space must use parking resources efficiently so allocation dozens of stalls to trickle charging won't cut it. In midtown Atlanta, there is a new 12 stall Supercharger station at Atlantic Station, a very large, upscale shopping center. Many people within the vicinity live in high rise condos, and at home charging is often hard to come by. But at Atlantic Station people can charge their Model S for a week in the time it takes to buy some groceries, go to the gym or do a little routine shopping. People have to pay for parking, so it is not ideal for someone who is just cruising through Atlanta. But if this is where you do regular shopping and you don't have at home charging, it may well be your best option as a Tesla owner. It is key that Supercharging is so fast. 80A charging might not be fast enough for this lifestyle.
So this is the kind of urban charging solution I would expect to see more of. It's got to be fast, convenient to weekly activities, and close to urban population centers. The thought that such urban dwellers may use 2 - 4 MWh of "free" electricity per year does not bother me. Sure that could be more than $2000 over 10 years, but that is a tiny discount on a Model S. People will only use Suoercharging that heavily if they really have no better options, and so it becomes a basic requirement for some to be able to make the purchase at all. So while we might imagine that 300 Superchargers may be all the "coverage" Europe may ever need for distance traveling, it may well be tha Europe needs more 3000 urban Superchargers to be able some day to support say 350k new cars per year and a total Tesla fleet of 4 million cars. I know this scale might be hard to imagine at this point, but really we are talking about Tesla when it has about a 2% marketshare globally. 4 million cars sharing 3300 stations weekly is about 1200 cars per station, 175 charges per day per station.
Another point regarding government subsidization of charging infrastructure is that it may be more prudent to create per kWh distributed incentives than to just pay for equipment. It is vital that the infrastructure that is developed actually be well utilized. Paying for companies just to put up charging where no one wants to use it, using equipment that charges too slowly, or charging fees per kWh that no one wants to pay is just a waste of public funds. If incentives are based on kWh actually dispensed to EVs, then developers will take care that it is well utilized and public funds might actually translate into electric miles driven. This is very much like the subsidization problem with solar. Just paying someone to install solar equipment does very little to spur good investments in solar, but feed in tariffs do a better job of incentivizing productive investments in solar. If governments are willing to subsidize per kWh EV charging, then this would work quite nicely with Teslas Supercharging infrastructure. They do a good job of actually putting energy in cars. With all this talk about standards for charging, it should be pefectly clear that 1 kWh is already a standard unit of energy and the goal should be to get this into cars in the most convenient and cost effective way possible. So incentivize kWh dispensed, not charging hardware.