Provided most TV makers take the sensible decision to capture most (non-sport) content in 1080 25/p what do you think it will be broadcast in? If it is interlaced to make it 1080 50/i and compatible with all HDTVs (without processing) some vertical line resolution will be lost (from filtering to reduce line twitter) and it would need film mode detection for the full progressive image. However if it is ever going to be broadcast in native 25/p it must be part of the spec to be able to interlace it (for HDTVs which won't be able to accept or display 1080p- (the majoritory at first)) and double the frame (for those which can). Before HD broadcasts begin (FTA terrestrial, not Sky-HD) and decoders are manufactured this must be part of the spec. What I mean is broadcasting 1080 25/p must be backward compatible with TVs being sold as HD-Ready (which only have to accept 1080i and 720p) and as soon as the uncontrolled (unlike Sky) market for HD recievers opens up any changes to the broadcast must be backward compatible with all of them. With regards to HD-DVD the players will have to be able to interlace 25/p but will they be able to output the pure native signal (doubled)- 50/p? (SD-DVD players always had to interlaced progressive it before optionally reconstructing the frame) If not we will probably be stuck with pre-mixed interlaced again as there is no advantage to anyone to record it progressively as it was all interlaced anyway. Hopefully this will not be the case. What does everyone think?