1) As oil becomes rarer and more expensive, forms of oil that are harder to collect or process will become more economical. The idea that the world will run out of oil in 50 years is absurd: http://economics.about.com/cs/macroeconomics/a/run_out_of_oil.htm
That's still open for debate. There's a lot of argument on the large-scale sustainability of tar-sands (which actually are in production in very limited amounts in Alberta) and shale oil (which many believe to be a pipe dream). There is no consensus either way. Even if proponents of these sources are right, and it is the long term solution (although supplies of
it would run out eventually as well), it would be a difficult transition (you couldn't get up and running in a reasonable amount of time), and we could find our economy in tatters due to shortages or at war with china long before that happens.
2) actually over 60% of our electricity comes from coal (in the U.S.), up from around 40% in the 70's (and wind power is a joke)
49.7% as of 2005:
http://en.wikipedia.org/wiki/Electricity_generationYou're right about wind power except in very limited circumstances (high-wind coastal or plains areas). Solar will probably be the renewable technology that wins. The technology exists RIGHT NOW to power an average home with solar panels on its roof and using storage batteries. Systems are available commercially. Unfortunately, the economies of scale aren't there yet to make the systems cheap enough to make people want to buy them. All that is missing is the political will to subsidize adoption, which eventually would create the economies of scale to drive the actual price down.
3) Yes, lets export our pollution to the country where our crops are grown and red-necks live. 

Seriously, making vehicles electric concentrates the pollution and fuel problems at central sources, allowing them to be managed, and solved. It gives us options and time due to the many different ways available to generate electricity. The status quo, putting fuel directly in vehicles, is a recipe for disaster given the current and likely future situation.