All that crap is what sells. That's what your average customer values.
And since that 'crap' has margins far higher than the base car, when it comes to electrics it can be used to help 'disguise' the cost of the rest of the car. It's also cheaper to build all of the vehicles with the features than to offer multiple line models.
Think a Leaf will go that far?
How much maintenance are you allowing? A battery change or two along with other 'routine' maintenance for a 200k+ mile car and it should be fine. Electric motors are extremely high durability, much of the rest of the system is solid state.
Personally, I want cloth seats. I dislike vinyl(and, to be fair, I'm not a fan of leather). Bluetooth might be handy. I want a radio, though it doesn't need to be fancy. Ability to take music from my phone via bluetooth would be awfully nice though.
And I'd argue that 'a bird in the hand is better than 2 in the bush' - saying a volt is the same price as an elio and 400k miles worth of gasoline isn't really true when you can go to the dealership today and buy a volt, but can't buy an Elio. I have looked into electric motorcycles though.
Looking up the company on wikipedia and such, I'm going to have to say that I rate their chances of success as lower than Musk's battery factory. Speaking of which, if the Sakti batteries work out, isn't there a very good chance that Tesla's factory could be retrofitted to build the new battery type?
edit: rereading, it'd be a nearly totally different manufacturing process, so while the lithium refining equipment and such would still be good, the rebuild would be quite extensive. But I'd think that Tesla could keep building the old batteries as it tooled up for the new ones in that case using the spare space in the factory.