"Never will" is of course an untrue hyperbole. There are stronger and stronger incentives to make this happen, and while it's probable that non-renewables will never go to 0.0%, they will definitely reach for it.

173TW is the amount of solar energy that reaches Earth. More than 10,000x what we currently use. Sure, we'll probably never (there's that word again!) use all of it, but it gives a sense of scale. And who knows, perhaps we'll use more since there's always the other side of the sun. Apparently, a full dyson sphere around the sun would theoretically give us 400 septillion (10^24) watts.