Ease of use. I don't have to wait forever for it to start up. I can play games, read the newspaper, watch TV, surf the web at a moments notice. I don't have to hear a fan buzzing when it's on(like a laptop or desktop) and it fits well on my lap with no need for a table or mouse pad.
The camera and photo (I consider them one) delight me. I have pictures of grandchildren, my quilts, my garden, ideas to rearrange things, old friends, videos of the tide coming in and toddlers on bikes, and so much more... I feel so fortunate to live in a time with such an interesting device.