When I logged in this morning, a couple of games we'd purchased tickets for are listed as cancelled on my schedule. I checked the FAQ but can't find out what happens now. Does Gen Con refund us? Or system credit? Or what? :)
One email I received for an event I purchased that got canceled said that if the event had physical tickets, you would need to return them at the con since the have been printed/shipped.
If the event was E-Tickets, they would refund it automatically.
(My event in question was e-ticketed and was refunded without me needing to do anything)