One by one people would come by. They would glance at the 7" Playbook and mumble something like "too small". Then they would then pass by the 8" Galaxy Tab and say "too expensive". They would pause at the 10" Xoom and say "hmm maybe". Finally, they would embrace the 12" Eee Slate (which is the same size as a cookie sheet) and say with a big smile "this is nice!"
People were evaluating tablets like they were TVs!
The more inches per dollar -> the better the value.
I fear this tablet thing is going to take a while to shake out :)