Altitude, atmospheric effects, and relative angular velocity are all factors in photography. Imaging from orbital platforms is also cheaper than airborne reconnaissance (per square meter, although the up-front capital investment is greater), covers a wider variety of purposes, and you don't have to worry about airspace violations; however, it may provide poorer definition, especially the more affordable commercial satellite imagery, and cannot compensate for cloud cover. So the distinction is significant on technical, operational, financial, and political levels.