I don't use my *netbook* anymore -- originally bought for travel and living room internet surfing -- since getting my iPad, but I use my laptop as much and more than before because the iPad and the laptop functions (for me) do not overlap.
I have never read a book on my iPad, but I did buy an iPod *after* using my iPad for awhile and I read on that. Recently, I supplemented my Sony Reader with a Kindle (and read them equally compared to each other and both more often than the iPod.)
I seem to be moving in the *opposite* direction of common predictions and surveys.