I should say the graphics can't render Big Picture at 1080p well at all but 720p is reasonable good thou not completely buttery smooth. At 1080p there is lots of studering, Steam warns you when trying to set big Picture to that resolution. The desktop is set at 1080p thou. That startup splash screen isn't completely smooth even on 720p. The system is an i3-2100T (low power SandyBridge) with Intel 2000(?) integrated video.
Plus I run my WHS in a VM on that box that handles all my storage needs, offsite backup (bitcasa) and home automation (HouseLinc). The WMC side of things does all my Live TV/DVR functions (HD Prime), media playback, DVD and Bluray.
This is why I find the streaming so cool, allows me to play my games on it even thou it's in no way a gaming PC.
