...I can run Air Video on it.
Also, I'm saddened by the fact that it only supports HDMI. I'm sure the snobs'll get on me for this, but I have my 54" SDTV that still works fantastically which I use for my Wii (I can't play Super Smash Bros Brawl on an HDTV, since the Wii only outputs analog, and I can feel the fraction-of-a-second lag of the analog-to-digital conversion rather badly). Were it able, I'd buy a second ATV for that.
Also, I'm saddened by the fact that it only supports HDMI. I'm sure the snobs'll get on me for this, but I have my 54" SDTV that still works fantastically which I use for my Wii (I can't play Super Smash Bros Brawl on an HDTV, since the Wii only outputs analog, and I can feel the fraction-of-a-second lag of the analog-to-digital conversion rather badly). Were it able, I'd buy a second ATV for that.