What it comes down to is that eventually it's better to have 1 thing than 2 things that serve a similar purpose. Many (most?) computer people today have 2 things because the gap is too great. Eventually the gap closes a little, and although it will never close completely, it is better to have 1 thing than 2 things, so you make compromises. I think that is what Jeff is saying here, the gap is closing just a little, and eventually a tablet becomes good enough as a PC.