My parents have a 60 Hz LCD TV that has adjustable levels of motion smoothing. I can tell when the motion blurring is turned on because some parts of the movies just don't look "right". But, most of my family can't tell the difference - they just don't see anything change.
"You stay here, Audrey -- this is between me and the vegetable!" -- Seymour, from _Little Shop Of Horrors_