You don't know what you're talking about. Just because you can't conceive of a use for it doesn't mean that other people don't have one. I've been begging for something like this (at an affordable price) for years, and I haven't been alone.
You really have no idea whatsoever what you're talking about.
How about this: you have no idea what I'm talking about. Let me say it again: you have no idea what I'm talking about. Maybe if I said it a third time I'd win the argument?
I'm not saying no one has a use for this, but that it's not something that many people will find a use for. Actually, they did do a version of this before and only sold very few of it.
Many people say that this is what the iPad should be like. What I'm saying is that the iPad is a product designed for a majority of people, while this isn't, so the iPad would not benefit from being like this, it would actually not work very well at all.