My friend Tom Galloway just did the following computations. I don't guarantee the math but Tom is usually right, and it sure felt this big…
This year, there were 52 aisles on the Dealer's Floor at San Diego. That doesn't include the Art Show area at one end.
From the floorplans at the convention center website, each hall is roughly 100 yards wide. Let's assume the .25-.33 mile distance from one end of the Dealer's Floor to the other (which took me 7.75 minutes to walk late Sunday afternoon…and that's without stopping along the way) gets lost in the noise of aisles that don't go all the way from one side to the other. And we'll include the Art Show area in that noise as well.
So that means that to walk the Dealer's Floor so that you went through all of every aisle, you'd walk 5,200 yards. Since a yard is three feet, and there are 5,280 feet in a mile, to see everything in the Dealer's Floor, you'd have to walk 3 miles.
And that's not counting how far you'd have to walk to get something decent to eat. Or to find a men's room. Frankly, I think they need to install a monorail.