I would like something that would JUST fit in my pocket (even if a tight fit) but would negate the need for me to ever carry my laptop around.

So 4.5 possibly even 5" so that 1024x800 would be usable.

The N900 is the closest to what I want so far. I am impressed how readable this forum is without zooming for example. However I could definitely live with a larger device as I am not shy to having heavy bulky pockets.

With the weight of the N900 I doubt it would be much heavier, might even be lighter if they can spread out the insides further so things need less shielding from each other.