1. Lower contrast ratio, not as good rendering in deep blacks.
2. Not as good at tracking motion (fast moving objects may exhibit lag artifacts).
3. Not as available in large screen sizes above 37-inches
4. Although LCD televisions do not suffer from burn-in susceptibility, it is possible that individual pixels on an LCD television can burn out, causing small, visible, black or white dots to appear on the screen. Individual pixels cannot be repaired, the whole screen would need to be replaced at that point, if the individual pixel burnout becomes annoying to you.
5. LCD televisions are typically more expensive than equivalent-sized Plasma televisions, especially when comparing EDTV Plasmas to HDTV-LCD Televisions.