If it's not a cost savings, that's cool. It's just been my experience that printing businesses do large-scale printing for cheaper than non-printing businesses. The stuffing is another issue :) But YMMV.
I'm not 'not trusting' anyone. But I'm hoping if I'm forced into e-ticketing in the future, whatever app I have to use doesn't ask for permissions to very much on my phone. Cause it ain't getting it.
As matthias pointed out, you don't have anything on your phone if you're attending, the event host just scans your badge. The only reason you might need an app on your phone is if you want to buy the ticket right there at the event, in lieu of giving them a generic. That's something they implemented this year, but I'm not sure how it works.
For a while, they'll still accept paper generics so it won't be an issue until they stop with all paper tickets. Even then, assuming there are still spots available, you could buy the ticket from the website a bit in advance, to give the event host time to download the updated attendee list.
The attendee only needs to be able to get to email easily and quickly. All the rest is on the GC/GM side.
It will still be a few years to 100%. My guess they will hit up one of the big organizers next (MtG, Pokemon, D&D, Pathfinder). The idea is to test with someone who has a combination of lots events/generics to test that process more.
the GM hits a couple buttons on his app and the attendee gets an email
Also, they definitely need to allow us to set the payment method on file for these purchases. Right now, it defaults to the last CC you used, and there's no way to change it.