I finally have the technology setup that I've been seeking for my classroom for years.
70" widescreen TV, big enough for everyone to see everything I project onto it. Sharp's anti-glare screen is very good.
Capability to project what's on my computer screen up onto the TV.
Elmo document camera wired into the TV--full screen projection when using the Elmo, no black bars on the sides or top/bottom.
It works much better than the iPad Elmo-like setup I had and it's everything I've been trying to get for years.