jay, head over to AVS and introduce yourself. there is a whole thread of people complaining that sony didn't stand up there and talk for hours about what it can do as a HTPC. except, err.. it's not a HTPC it's a gaming machine. what you want to do with it is fine, but most initial press is gonna be about gaming. go figure.
btw it will do 4K and 3D and no, it doesn't have a BDXL.
samsung PN50B550, Oppo BD-80, Wii, PS3 Slim, Xbox 360, mac mini HTPC, Denon AVR-4311CI, and Axiom QS8 surrounds, dual Rythmik F15 subs, Salk HT2-TL's, selah sardonyx center.