I'm surprised Rogers didn't comment on how he was in a giant flying aircraft carrier. (Or maybe he did, and I just forgot it.) He actually didn't have as much trouble with modern technology as I was expecting, aside from that one amusing line where he pulls out the complicated-looking panel and goes "It seems to run on some form of electricity!"
When you think about it, nothing he sees here is really that
much more advanced than all the retro sci-fi gadgets HYDRA had in his movie's version of World War II. Less advanced, in some ways, since everybody is still using bullets instead of lasers.
Yeah I would have liked to have seen more of his reactions to the modern world too. Not so much with regard to technology, but just the radically different society and culture he now finds himself in.
I'm sure we'll get a lot of that in the Cap sequel, but I really think it would have given him more dimension in this movie as well. Because as is, it kinda feels like he's just along for the ride.