Sony must kick themselves for the Home thing. MS basically took a couple of the interesting community features (consistent party and game-hopping with XBL up to 8 players, netflix movie watching together), the 'avatars' and cut out a lot of the fat that caused Sony to delay it for the past years. MS might even release it before Home. It really is baffling.
Though it also seems they're standardizing some of the Halo 3 online features (party, theater mode, access marketplace from PC)