True, it is fully backed and will happen. But my limited experience with Kickstarters is that you can get more bang for the buck if you get in early.
Then again, there's a benefit to waiting in that errata can be applied to later printings. And sometimes quality is improved in later printings. I remember playing my friend's KS Sentinels of the Multiverse. It was still fun, but the cards were a little flimsy, and everything was thrown into a box with no dividers. Many KS backers paid for the new version because the packaging and cardstock were just so much better.
So, should one jump into Dresden early or wait it out?