Tablets are, first and foremost, super light, very easy to hold and carry media consumption devices. They do this better than a laptop because the are super light and very easy to hold and carry. Also, if you are not a moron, they are cheaper than a laptop too.
If you are like me you can turn them into creation devices as well by attaching a bluetooth keyboard which I realize pretty much turns it into a really cheap, but still pretty powerful laptop, but it is one that can very easily turn back into a very cheap, super light . . . . you get the picture.