Yup, break19 - 1080i is actually a copout by the hardware manufacturers on the consumer end (cable/satellite decoder box manufacturers as well as HDTV manufacturers and bluray player makers).
Most of them take what's actually a 1080p frame and interlace it - it's cheaper/easier for them to do an interlaced image than a progressive scan image. Thankfully, enough people got pissy enough that most consumer-end manufacturers are now doing proper 1080p hardware. :-)
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-- Taryble
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