The part I do not understand is how your eye would focus on a screen that is so close. My eyes (and I believe most others) cannot focus on anything closer than a couple inches away. Yet the lenses on glasses are much closer to the eye than a couple inches. So I would guess they would have to use some special technology to separate the light rays in a way that your brain could make an image from it.
The fee is $110 for award flights. There is no fee to change or cancel a flight ticketed within 24 hours, so long as the reservation was made at least 7 days prior to departure. United Airlines charges change fees of $200 for domestic flights and up to $400 or more for international itineraries.
Delta Air Lines Delta charges an award ticket redeposit fee of $150, which is waived for Diamond and Platinum Medallion members. Award tickets not canceled at least 72 hours prior to the originating flight departure time are nonrefundable; however, Delta representatives have been known to grant exceptions.