it does auto resize, but it takes a bit longer to load all the massive pictures before it resizes them.
The last photo I think would look better if you had the cars all the way in front of the building and didn't show the edge of the building, so no trees and bush in the background/side too.. The overall look is very straight and uncluttered and then the corner if the pic is all busy and distracting and draws your eye away from everything else. Also, I would probably have gotten closer to the cars and tried not too have too much sky and foreground in the picture.
just my 2c and my personal taste.