Subject: What is the future of ion engines?

I read an article recently in Popular Science about Deep Space 1 and was 
in awe of the ion engine.  Previously I never heard of it.  I have since 
done some independant research on the subject but would like to ask the 
experts: is it feasible to create a device that generates enough power to 
run an ion engine on the surface of Earth?  Will we someday be able to fly 
around in an ion-powered car?

Re: What is the future of ion engines?