The minimum resolution requirement for something to be called "high-definition" is any display that can show 720 horizontal lines, meaning that XGA (or 1024 x 768) should be considered high-def. Our contention is that XGA is a computer resolution and that the more traditional 1280 x 720 (or higher) would be required for the HD moniker. Take a look at Henning's thoughts over at HDBlog for his insights on the subject.