If you're a store trying to convince people to buy expensive TVs i really don't understand why they don't have all of them displaying some kind of action packed BluRay =P If all the sets look the same because the content being shown is crappy, then people are just going to go with the cheapest set.
From the sets we saw we could see a _very_ slight difference between LCD and LED. We saw absolutely no difference between 60hz and 120hz. However i know that's supposed to be a relatively big difference when playing DVDs because of the 24hz display rate. Unfortunately my monitor is 60hz so i can't even compare videos online to see the difference and figure out if it's something we're likely to care about =P