There seem to be no changes this year, in terms of I/O - inputs and outputs. Located on the side, from front to back, first there are two HDMI 1.3b compatible inputs. Next comes an analog PC input (standard HD15 connector), which the original RS1, and also the RS10 did not offer. (I'm not sure if the new RS15 has a PC input, but we'll address that when it's reviewed.)
Next up, are three RCA connectors for the component video input, followed by another RCA connector for basic composite video. Next is the S-Video input, followed by the RS-232 connector for controlling the projector directly from a computer or room controller. Finally, there is a 12 volt screen trigger for controlling a motorized screen or masking system.
Add all of them up, and you have a fairly standard complement of inputs and outputs, with no surprises. As with all home theater projectors, I'd still like to see three HDMI ports, but I've only seen that on a couple of 1080p projectors so far.