I was at an Apple store yesterday and there were plenty for sale. While I played with one 2 women came in and had one of best conversations I've heard...
"This looks cool, it could be the small computer I've been looking for."
"Neat, it uses apps from the app store."
"Oh, it's just a big iPhone."
She puts it down and leaves the store. I think a lot of the general public that isn't as effected by the RDF is going to do exactly like she did.
Now that I've played with one I think it's a neat device, but it has its problems. Weight is a huge issue. I can't see anyone holding this up with 1 hand while reading for very long. Typing is horrible. I tried both orientations, thumbs, no thumbs, etc. I can type much much faster on my iPhone. The iWork apps just seemed gimmicky to me.