Check out the contrast ratio. The display of "Black" on those screens is beyond comprehension unless you see one in the flesh
Thats a truth with heavy modifications. LED does nothing for the panels contrast, it only allows for wider range of "dynamic" contrast (which is already too much on Samsungs) and locally dimmed "dynamic" contrast
if the backligt is laid out correctly. LEDs can be switched all the way off while CCFLs will emit some light at their lowest setting, thats why Samsung can claim 2000000:1 "dynamic" contrast, but seeing as the existing models are already adjusting the backlights way too much for comfort, it's just a marketing blurb, like the "old" 20000:1 claims.
The new "super slim" LED-lit samsung TVs have the baclighting along the edges, not behind the panel, so they actually loose uniformity compared to the previous CCFL generation without gaining anything other than silmmer design.
The key feathures of LED backligts are:
- Allows slimmer design (good for laptops and consumer displays)
- Consumes a little less power (good for laptops)
- Allows for higher gamuts (could be usefull on high en displays, but 110% aRGB is already possible from CCFL)
There is a reason why LED LCDs are only available on consumer grade TVs and cheap laptops (my £500 Lenovo laptop is LED backlit), while there isn't a single high end product available.