@marcus, perhaps this is something that can be collaborated or outsourced with the Woo team in order to bring it to market sooner. You can piggy-back off of each others' success to make an even more powerful product; owning the market to impede competition. It's good integration and makes business sense for both of you. Hopefully if it pans out there can be a way to do it very cost-effectively for the end-user. If you can see the market share value in the partnership, perhaps it can be a "free" value added add-on.
I really can't see anyone using another pro event manager type plugin with this type of checkout process, especially the vast majority using woocommerce.
Let me know if you want me to plant a seed with the Woo guys too as I would gladly do it to help move something along in this direction.