5-10 years from now, I'd expect to see EV's with ranges in the 500-1000 miles per charge range.
I'm not so confident. If they could get it to 300, that would be an accomplishment.
Well, Tesla already has 240 mi range - 300 mi range could be done today simply by using Panasonic's latest batteries instead of the older ones. Of course, the Tesla battery pack costs as much as the entire LEAF!
Not to mention, that anything more than 300-500mi range or so is overkill. I would be happy with 200mi range at highway speeds and the ability to recharge to 80% in 30 minutes. Usually after driving 3+ hours you are ready for a short break, anyway.
Sure, it would be nice to have 500mi range on those very rare trips where I am driving all day, but I can't think of an all-day trip where I did not stop at least 3 times for 10-30 minutes.