There are some questions, though. What happens if you want to change seats, or you realize you don't need to check bags after all? We've asked Delta for answers, but there is a chance that this could create problems for travelers who need to make last-minute changes. Even so, it's easy to see this feature spreading. This makes traveling a bit less painful if you're just confirming your original flight choices, and airline staff can breathe easier knowing they'll see fewer people scrambling to check in at the airport.