Apple tablet a reality?

Rumours about an Apple “tablet-PC” have been pretty pervasive for the past few years, so I always take them with a pinch of salt, but this one sounds almost credible. I actually don’t know if I want this to be true or not; one the one hand, I’m certain Apple wouldn’t release it unless it worked (good handwriting recognition, decent battery life, a window-manager that feels natural with a touchscreen,) but on the other hand, I don’t see how there’s any way I’d resist buying such a thing, and it would be bound to be expensive.