So your PC has a proprietary 10 pin HDTV input, that attaches to some sort of dongle that you "should" be able to attach your PS3 too...
BUT the cable that ships with the XPS only supports S-Video, or composite RCA inputs.. so you will have to contact Dell and get a Component or an HDMI dongle (if it even has one).
Then you haev to open the "TV" app and select that input..
No, the monitor does NOT act like a TV and have multiple input modes.
360: Burnt of Wrassl