Yes and yes. I am not saying I don't use my laptop, just that there are frequently times when I would have pulled out my laptop to google something or check a score or email but now my first reach is for my iPhone. Some nights I don't even take my laptop out of its bag. There are also places and times where in the past I would have toted my laptop with but now can rely on my iPhone to keep me connected.
^^ This
Will it ever replace my laptop? Probably not as i still have to type up docs on flights, review power points, watch movies on a bigger screen, and the storage and portability to bring my desktop stuff with me. It will however keep me from toting my laptop everywhere like the library, a friends house, or vacation trips.