Just found this when looking earlier:

LCD
Size: 19 inches to 65 inches
Manufacturers: All
Pros: Consumes a lot less power than plasma; models with matte screens work well in bright rooms.
Cons: Dark-room performance generally worse than plasma; worse viewing angle and uniformity.
Best for: General use in brighter rooms where potential flaws won't be as visible as they are in dark rooms.

LED
Size: 32 inches and larger
Manufacturers: All
Pros: Uses slightly less power than LCD; thin panels; some models have improved picture quality.
Cons: Expensive; most models offer little to no picture quality benefit compared with LCD.
Best for: Big spenders who want thin panels or videophiles who understand the differences between LED technologies and don't want plasma.

Plasma
Size: 42 inches and larger
Manufacturers: Panasonic, Samsung, LG
Pros: Black-level performance in dark rooms; uniformity and viewing angle.
Cons: High power consumption; glass screen can reflect light in bright rooms.
Best for: General use in all but the brightest rooms; videophiles who place a premium on dark-room picture quality.

Rear-projection TV
Size: 60 inches and larger
Manufacturers: Mitsubishi
Pros: Huge
Cons: Huge
Best for: Those who want the biggest screen for the buck, period.
Of course, this is a very basic, quick and dirty assumption, but thought would post to give you a little more info