I love it how the goal-posts keep on moving - and how a solution has to solve 100% of the problems or it is a complete fail. Why can't a solution simply be a step in the right direction? Or a solution that works for a very large portion of the population?
On to your arguments:
Tesla will be able to get you from Virginia to Tuscon and Colorado via their Supercharger network in the next month or two. St Louis will be accessible by the end of the year.
Will it be as fast as a gas/diesel vehicle? No, but for cross-country road trips just rent a Prius if you're aiming for maximum speed and efficiency. And as many people will attest, actually slowing down an enjoying the scenery can enhance the road-trip experience. Or simply use a plug-in hybrid - all your local miles will be electric - and you can still have your road trips. The vast majority of your annual miles are within 40 miles of home - low hanging fruit.
As far as 18-wheelers: Most of that cargo should be moved to rail leaving short/medium haul trucking. Short-haul trucks can be electrified, medium-long haul can use natural gas and/or fuel cells. Railways can also be electrified (most trains are simply diesel generators that run electric motors, anyway). Aircraft are a tough nut to crack - bio-fuels are probably our best bet there in the near term.
And as far as power plants go - we need more low-carbon power plants regardless of whether or not we electrify the fleet. But a huge portion of the fleet can easily be powered without substantial changes to the electrical grid.