I am in the process of buying a house in Driggs so this is a welcome addition to have some other ways to get to JAC and maybe some pricing pressure on other airlines. None of these routes are imminently useful right now since PDX isn't included, but maybe the SJC flight will make sense now and then...the timing is pretty fine to be able to make it to/from SJ for the flight if it's ever needed.
As mentioned above these would be much better if they go year round, I intend to be out there more often in the summer/fall than in the winter.