I just got mine installed yesterday.
I have no idea what you're talking about. This is a 60Hz TV and does not exhibit any effect of pixel doubling.
As to the TV itself, there is a bit of backlight creep in the upper two corners if you look at the TV from below the top. At the right viewing height and distance it looks absolutely fine with almost zero bleed. I have only 6-7 feet between myself and the TV as of now, so it gets a little weird on the eyes sometime - once I move everything to its correct location it should be fine. Even so, I watched a SD movie last night and could not find anything to complain about.
I had to tweak the factory settings to get it to look right. Out of the box the settings are meant to blind you. The backlight can be turned way down for a more natural picture, though the contrast ratio available is fairly poor - not much detail in the black areas.
At 31-32k (I paid 32k something off Flipkart) for a 40" screen I can't really think of a better option. If you go down one size and up one price range you can find a better 32" TV. I don't watch that much TV or that many movies, so a cheap option like this one worked fine for me.
I could not understand your question on plasma and why it might be relevant to this product. Anyway - yes, plasma TVs do hog a lot of power, but there are differences even between LCD sets. In Toshiba's range alone this particular set is one of the highest power consuming TVs, the newer 40 inchers are all around the 100W mark whereas this one runs about 200.