And on the ATVM loan, that was approved by the Bush Administration to build advanced technology vehicles in the USA. Nissan and Ford (which everyone seems to love around here, as opposed to GM) were the other large recipients (they got even more: 1.6 billion and 5.9 billion respectively).
Given they are the only American company that's building EVs from the ground up, I say they deserve the loan. Also I wanted to add, the main condition of the loan is you have to have matching capital to get it (that means you have to have a matching amount from private investors before the DOE will even consider you as a candidate).
The DOE reports state with or without the pipeline the amount oil from Canada in the next 20 years would be the same, because there is plenty of excess capacity in other pipelines. In fact one of the biggest attractions of XL is it heads directly to tax-exempt Foreign Trade Zones in the Gulf, which makes it easy for Canada to export oil to countries other than the US (selling to the US is not as profitable). It doesn't really help the oil situation of the US.
Have you looked at the cost of an Apple product recently? Visionaries rarely create cheap products. It's up to the rest of the market to create those. The visionaries create the first version that wows all the early adopters and gets the process of commoditization started.
And Tesla is the closest in all your criteria besides cost (the Model S is 300 mile of range, 320 if you buy the aerodynamic wheels, no other EV is even close; Tesla's "supercharger" can also recharge that huge 85kWh battery from 10-90% in 45 minutes).
To be a patent troll you need a history of starting such suits, which currently Google doesn't have yet, nor does Motorola (the only suit they started is with Apple; the Microsoft suit was retaliatory). On the other hand, both Apple and Microsoft have a history of going around suing companies on patents. I think you have to look up the definition of patent troll (you aren't one if you just started on suit).
There is no need for batteries to ever beat the energy density of gasoline (consider this: almost all EVs can go more than 100 miles on an equivalent gallon's worth of energy; that's about 3-4x the efficiency of most cars).
And your price equivalency is false (because you are trying to compare a one time cost to the recurring cost of gasoline). And never say never, because we made much more progress in the last 20 years than in the 100 years before that just based on Nimh and lithium-ion batteries. For example, a car like the Leaf ($35k price tag for a 24kWh of batteries) wasn't possible just 10 years ago. Another example is just to look at how batteries in the consumer electronics market (for cellphones, laptops, media players, etc) progressed in the past 20 years. These batteries were non-existent before then.
I think BEVs are pretty much there already in terms of technology. Just the price has to come down and the charging (and/or battery swapping) infrastructure has to be built to support them.