A good reason? It depends on who you ask. For one thing, 1080p wasn't part of the HDCP standard. For another, no 1080p content has been available, and scaling to 1080p from an external processor was a relative rarity and not a particularly motivating factor for mainstream manufacturers. For one more, why offer 1080p at this point when you can offer it down the line and make at least one segment of the buying population contemplate upgrading?

Ed