I was having lunch with a friend and we chat about the future where most people will use the tablet more than a PC. ( I know, that's Steve Jobs' vision, but it's also Bill Gates' and also mine. ;) ) Anyway, he start asking questions like, "but is the tablet powerful enough to handle everything".
This reminds me of the early day of digital photography when people asked, "wow, if we are taking hundreds of pictures, wouldn't it cost a lot to have them developed?" "how do I put them in albums?" "what do I do with my baby book if I don't print all the pictures out?" "So I won't be able to flip through the pictures?"
With new technology, your behavior will change. There will be give and take but to the better for the most part. I think it will be the same in the tablet world. A world where most 'computing' is done from a tablet like device rather than a PC. Some people will love it, some will hate it, most will adjust to it. That's progress and I like it.