Almost but not totally.
This is a discussion on Has the iPad Killed the Netbook? within the Apple iPad News forums, part of the Apple iPad Forums category; Almost but not totally....
Even if my tablets or phone were capable of doing everything my work PC and laptop could, it wouldn't make sense for me to have only a phone or tablet.
My IPad 3 didn't kill my Asus Netbook since there are still things the winXP device can do that the IPad cannot. For the past year, I've taken both devices with me when travelling. However, my latest purchase, a Surface Pro, definitely killed the Asus.