Congratulations to Epson for having a Picture - In - Picture feature that lets you use two HDMI sources. That's been a sticking point for years in the few projectors sporting PIP. Last year, in the 5020UB and 6020UB, there was side by side viewing - two equal sized images (or one slightly smaller than the other), but you could only use 1 HDMI source, and had to use a different source for the other window. This year Epson let's you use HDMI 1 and 2, but the limitation is that it's PIP, so one image is full screen and the other a small inset. Still, better than what else is out there. A nice touch, for those who like PIP. I might have for football, but instead I shell out for DirecTV GameMix which gives me up to 8 games at once.
In the image shown here, you can see in the upper left hand corner of the main image, the smaller picture. The larger image in this case is off of DirecTV while the smaller picture is the main screen of my Sony PS3. Takes but a second to swap large for small.
Still PIP is a good way to keep your eye on a second screen, maybe you are watching something in real time, it goes to a commercial so you put something else on the main screen, the show you are watching in the window, and then when commercials are over, switch the windows, and close the one you don't need. It's all a quick click or two!