I'm probably the wrong one to answer this, as I am just about blind as a bat. However some more information may be helpful. What kind of gaming? Xbox360, PC games, NES, PS1?
Maybe there could be better connections for your game machines, or settings that could be changed to crisp up the movement? Or maybe it's a plasma problem? If it's a t.v. specific problem, perhaps the display forums would be a better place to ask. Everyone over there seems to have vehement views on what displays are better at what.