Epson has an HD projector that was designed with Apple customers in mind. The MegaPlex MG-850-HD has all the bells and whistles you would normally see on a mid-range projector including HD 720P support, a brightness of 2800 lumens and built-in speakers, but it's the projector's connectivity options that make it interesting.
This particular model has a dedicated dock that's compatible with the iPhone, iPad and iPod touch. This dock makes it easy for you to take the contents of your iOS device and display it on a 40-inch screen. The projector will even charge your iOS device when you have it docked. If you have a Mac or a PC, you can use the on-board USB port to connect your device to the projector as well. These connectivity options are convenient but they will cost you. The Epson MG-850HD lists for a pricey $799.