They are running late.
It looks as though Nissan's double density NMC battery is about ready to go:
http://www.greencarcongress.com/2009/11/nissan-nmc-20091129.html

'The new system, which will reportedly offer almost double the capacity of Nissan/AESC’s current manganese spinel cell, is supposedly slated for deployment in electric vehicles in 2015.

Nissan is raising capacity by improving the positive electrode, specifically, using nickel and cobalt, not only manganese. The new battery can store about twice as much electricity as batteries with positive electrodes made only from manganese. It is robust enough for practical use, able to withstand 1,000 or so charge cycles.

Nissan estimates that the battery will cost about the same as conventional lithium ion ones to produce, as it contains only a small amount of cobalt, a relatively expensive metal.'

Nissan have recently been using a car with 48kwh on the racing track, although the windows were blacked out so it couldn't be seen whether they have used the back seats for conventional batteries or were using more advanced ones in the normal battery pack space.

They also surveyed Nissan Leaf owners to ask what premium they would be prepared to pay, with alternatives up to $5,000, for 150 miles of range.

Renault have said to expect surprises for 2014.

I think that the delay in the Zoe for Norway is to offer the higher density pack there.

Regarding Nissan, 150 miles - 75 miles range = 75 miles additional range for $5K. Assuming 3.5 miles per kWh then the $5K buys you an additional 21 kWh which is purchased at $238/kWh to the end customer. I guess when you double capacity you also lower cost. You can plug in some alternative assumptions and you find that they will easily be in the $200-325/kWh range regardless of what numbers you use for original range, miles per kWh, etc.

Not only are there improvements in battery tech to come out shortly, but there are improvements that will continually happen for the next ten years. Hint: if someone is talking a lot about how they are going to do something, they are just looking for funding, and don't necessarily have an idea about how they will accomplish that task. Those that are close to completion on an advancement tend to keep things quiet. In other words, those making the most noise likely have nothing. But, the quiet ones probably know something you don't.

@Brotherkenny:
The cost figures per kilowatthour you use are in the right ballpark, although presumably the increase in range is from the 2014 Leaf's EPA rating of 84 miles to 150 miles, but I don't agree that there will be continual improvements over the next ten years in battery tech.

Musk sees no major advancement in the next 4-5 years although he does see a 30% and hopefully 40% drop in cost.

Other than for cost batteries don't tend to improve so much incrementally, but in jumps when they go to a new chemistry.

For instance Nissan's NMC chemistry has around double the energy density of their current LMO. and about matches that in the 18650 lithium aluminium Panasonic batteries in the Tesla.

Nissan though have taken 5 years from the post I quoted to get them ready for mass production, and that is if they release tomorrow.

There are scads of new technologies about, from silicon to solid state, sulphur and even lithium air.

The problem is that I know of nothing even approaching the level of development of the NMC batteries that it took Nissan 5 years to bring to production.

So maybe there will be improvements other than some further cost reduction in the next ten years, but we haven't really got anything on the horizon yet.

Even at 2x im not interested to buy in a bev but if fitted in a phev with gasoline range extender or hydrogen fuelcell range extender then I might be interested to buy. 2-2-2 batteries make more sence than 1-1-1 batteries like tesla, leaf and volt.

'Since Nissan has shown little interest in building out a interstate supercharger network, it still would not be suitable for long trips.'

That was pretty much chicken and egg.
Nissan knew that the Leaf with 84 miles of range is not suitable for long journeys, so did not try to build a network of the 50kw CHAdeMO chargers which are all it can handle.

To a certain extent the 150 mile Leaf will be a different ball game, and so Nissan can get on with it and facilitate roll out of the 100kw chargers it will need to make recharging speeds adequate.

If you are going as far as the Midwest to the East coast often, I would not fancy the 150 mile Leaf, or even the 200 mile Tesla E, as both will get less at highway speeds.

In my view the Tesla E is more likely to start at $40k or so before the options, not be less than that.

If you are doing such a long run rarely, then you can hire.
If not in 2 years you will have plenty of plug in options beside the Volt, VWs and Audi's and the Mitsubishi Outlander, which has the advantage that it can be used as an emergency generator too in the event of outages.

It seems that in reality you are only going to consider a BEV, so just do that and hire a car if you have to for your longer journeys.

@Harvey,
The 10-10-10 future EV battery is already available. It is known as automotive H2-FC system, along with super-fast charging at MegaWatts power level, and long range above 300 miles!

Well, let's see, automotive H2-FC is capable of 1,500 Wh/kg and costing $16-18/kWh. Current Lithium ion in the Leaf is ~130 Wh/kg and ?$400/kWh.