it's very simple. plasmas with 1024x768 is the resolution for pc hook ups ONLY. why manufacturers don't give you 2 resolution specs for different types of inputs beats the heck outta me. once you feed HD content into a "supposed" plasma with ONLY 1024x768 such as an HD program, blu-ray movie, or HD videogame...the plasma's TRUE resolution of 1280x720 shines through. so to further answer your question and cut out all red tape...the TRUE resolution IS 1280x720 for a 720p plasma but ONLY if you feed it HD content. this holds true for any plasmas that the manufacturer advertises is really for pc hookups, which i think causes more confusions.
that's why it's very difficult to notice any difference between 720p and 1080p when both are being fed HD content. anything under a screen size of 50" or lower; going 1080p is unnecessary and a waste of money. going 1080p on screen sizes larger than 50" would be ideal because more pixels need to fill up more space. go to your nearest bestbuy or something and check out a 42" plasma 720p versus a 42" lcd 1080p and i guarantee you will NOT be able to tell a difference.
i like plasmas WAY more than LCDs; the color and contrast as well as blacks are just incredible that LCDs still need years to catch up on due to their backlighting issues.
now another technology that some manufacturers have created in their 120hz LCDs is called auto motion plus (samsung) and motionflow (sony), which i think is utter garbage. an HD movie feels like it was shot with a video camera. it just doesn't feel like a movie anymore. the movements are unnatural and actually awkward. i can't watch more than 5 minutes before i have to turn away...utter abomination! but that's just my opinion. some people love but i think most hate it.
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