But if you want standard television programs like news,live shows etc,you need
to use 1080i because all HD cameras shoot 1080i unless they are swiched to the 24P
mode,but that is used for cinematography.
24P is not smooth enough for television programs,but it is good for fictional content (for a number of reasons)
If HD video content becomes progressive (like shows news etc.) it would need 60 fps progressive,and that is a waste of tape for
news or TV shows.
I imagine a future broadcast system that would switch between interlaced and progressive
in real time depending on the natue of the content. Like all 24P HD content,and film content being aired in
progressive and then everything else switched to interlaced.
I suspect future TV sets will accept both interlaced and progressive 1080 image.