I thought I remembered reading somewhere that it was only a 1080i screen and some people were false advertising it saying it was 1080p or something like that. sorry
All LCD, DLP, LCos, and Plasma screens are progressive (aka non-interlaced).
1080p (@60 fps) material (requiring and going into a 1080p input jack behind the TV) should be displayed on a 1080 LCD as true resolution, all other input must be digitally upconverted which the TV will do for you although not necessarily superbly.
There is no 1080p@60 material generally available to the consumer. The only way the consumer would come into contact with 1080p video signals is when purchasing and using an external scaler (e.g. Faroudja DVP1080, Lumagen HDP, scalers with Realta chipset) in an attempt to bypass mediocre upconversion inside a TV.