Recent research in the US showed that the biggest challenge faced by Blu-ray manufacturers is not hi-def digital downloads or high hardware prices but the fact that people are perfectly happy with the picture quality from their upscaling DVD players. And judging by some of the upscaling decks we've tested recently, we can understand why - they might not be hi-def, but the pictures are sharp enough to make anyone think twice about paying £300 upwards for a hi-def deck.

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