Yes, You'll get v1.x for free. Thanks for supporting our efforts.
I'm not sure how much the art packs will be...it depends on how long they take to make, and how robust they end up...I'll almost certiantly release free, less robust ones to Spriter owners to help get them started.
The art packs are still at least a couple months away though.
As soon as the new Spriter is tested and proven stable enough for daily use (which I'm sure won't take long knowing Lucid), I'm going to try and comission other pro artists to create art packs as well.. And of course, ANY artist is welcome to create art packs themselves to sell or give away freely without any obligations to us. If an artists makes a really high quality art pack, we'd be happy to help market it through what will become our official web-sites and marketting system. (whatever that becomes)