I'm rather curious about this myself. The DVI input supports HDCP, which is a good start, but there's been a lot of confusion about it's suitability for hidef broadcasts in the uk, primarily due to the manual which states that the set supports 720p/60, 1080i/50 and 1080i/60 but makes no mention of 720p/50. I've come across threads in which various people have contact Samsung asking about this and received conflicting answers. I saw the set in John Lewis today, with a HD-Ready sticker attached, but I wouldn't count that as a definitive answer.
Anyone know anything more?